Dr. Gwin testified by deposition on January 27, 2016. She had previously prepared reports dated September 17, 2015 and November 17, 2015.
Dr. Gwin prepared a report dated September 17, 2015. This report was prepared after she had an opportunity to review all of the evidence in the case.
She testified that the medical records indicate that Mr. Elsworth has a past history of attention deficit disorder and oppositional defiant disorder. She testified that the radiology reports show: -right frontoparietal scalp hematoma with embedded debris also other injuries on the right side.
She examined the photographic evidence, drew conclusions, and indicated that the photos revealed:
-blood on the driver's door.
-the seat belt was found in a stowed position with the lath plate near the outboard anchor.
-the webbing and hardware do not show signs of loading.
-the latch plate buckled, and did not release with tension on the belt.
-there was fluid staining on both the inner and outer surfaces of the driver's door, as well as the outboard side of the driver's seat.
-there were scratches and dirt stains on the headliner indicating side-to-side movement, as well as an apparent contact mark with fluid staining on the header above the right passenger door.
She testified that she adopted what the accident reports said regarding the accident. She was aware that Mr. Vega reported that the vehicle was going 51 to 61 mph and his inspection found no evidence consistent with seat belt use.
Based on her expertise she gave her opinions regarding Occupant Kinematics during the crash: -as the vehicle rolled onto its right side, Mr. Elsworth would move toward the right side of the truck.
-because he was unrestrained, his head and face struck the passenger door header as well as the roadway with the intervening fracturing passenger window.
-as the rollover sequence continued, as the vehicle rolled onto its roof then left side, Mr.
Elsworth's upper body moved across the roof and back to the driver's seat.
-as the vehicle came to rest on its wheels, Mr. Elsworth, having sustained a brain injury rendering him unconscious, was slumped to the left, partially outside the driver's window.
She indicated that Mr. Elsworth's severe head and face injuries were the result of striking the passenger door header and ground with the intervening fracturing passenger window. She stated that if he had been properly wearing the available lap and shoulder seat belt assembly, he would have maintained contact with his seat, and likely would not have been able to reach the passenger door with his head and face.
Dr. Gwin prepared a supplemental report dated November 17, 2015. This report was prepared as she was asked to provide opinions regarding seat belt use. Her opinions were:
-there was no evidence of seat belt use by Mr. Elsworth.
-there were no load marks on the seat belt webbing, D-ring or latch plate.
-the latch plate buckled and did not release with tension on the belt.
-there was no injury on Mr. Elsworth's body consistent with seat belt use.
-there was no localized injury to indicate seat belt loading.
-had he been restrained he would not have reached the right side of the vehicle where his severe injuries occurred.
-had the seat belt unlatched in the course of the rollover event, Mr. Elsworth would have injuries localized to his left upper extremity due to entanglement with the seat belt webbing.
She also discussed injury causation and stated that:
-Mr. Elsworth's severe head and face injuries were the result of striking the passenger door header and ground with the intervening passenger window.
-had he been properly wearing the available lap and shoulder seat belt assembly, he would have maintained contact with his seat, and likely would not have been able to reach the passenger door window with his head and face, preventing his injuries and preventing the severe disability resulting from those injuries.
-had Mr. Elsworth not lost control of the vehicle, he would not have been injured at all.
Dr. Gwin testified by deposition on January 27, 2016.
She is currently employed by Biodynamic Research Corporation located in San Antonio, Texas. She testified that she is a biomechanic, which means that she looks at living tissue, and in humans the mechanics is the study of forces and how they act on certain objects. In general she testified that a biomechanic looks at how forces and accelerations act upon people and how injuries are caused. She testified that by education and training she is an engineer and a physician. She testified that she worked for ten years as a full time physician prior to coming to Biodynamic. As a biomechanic she indicated that she evaluates injuries of all types including those from automobile accidents. Some of her previous education and experience include: -experience as a full time emergency room physician. She is board certified in emergency medicine.
-a degree in electrical engineering.
-a bachelor's degree in nursing with eight years of practice in an emergency department.
-work as an EMT and fire fighter.
Dr. Gwin is accredited by ACTAR which is the Accreditation Commission for Traffic Accident Reconstruction. She indicated that you have to have a lot of education in accident reconstruction to be so accredited.
As an engineer she testified that she worked for Ford Motor Company where she gained experience working on heavy dump trucks such as the one in Mr. Elsworth's case.
She testified that she performed her evaluation in December 2013. She was hired to evaluate what happened to Mr. Elsworth, to determine how he received the injuries that he received, how they occurred and to provide any opinions about the speed of the vehicle, whether Mr. Elsworth was wearing his seat belt and whether the seat belt was latched or unlatched.
She testified that her review of the medical records revealed that:
-Mr. Elsworth had a past medial history for ADHD/attention deficit disorder and oppositional defiant disorder.
-Mr. Elsworth was found unconscious at the accident scene and was taken to a hospital where he was found to have severe brain damage.
-he also has other injuries including severe facial injuries with the most important one being Lefort III injury. A Lefort III injury means that that he had fractures through the orbital bones as well as through the maxillary bones on both sides. This is a type of injury where you can pull the whole foreface away from the rest of the skull.
-he had an open right sided skull fracture which was basically in the frontal and parietal areas. The fractures went through to the brain and since they were open they allowed open air to communicate with the brain. This is a very serious injury.
-he also had other sorted injuries.
Dr. Gwin was provided with a significant amount of information to review including photographs, medical records, accident reports, etc.
She testified that her examination of photographs showed:
-fluid/likely blood staining on the driver's door to indicate where Mr. Elsworth ultimately wound up.
-there was no evidence that Mr. Elsworth was wearing his seat belt at the time of the crash. -there were no signs of loading. She indicated that the belt locks up and keeps us in our place in a crash. When we load we move and stretch the webbing as we move around in the vehicle. There are generally marks on the D-ring where the belt comes through and then goes across our chest. This is generally made out of plastic so when the webbing rubs across it, it gets very hot because it moves so quickly and so there is a lot of heat. The plastic will usually melt and it will flow a little bit and there are characteristic striations or marking on the plastic D-ring as the webbing moves. The same thing exists around the latch plate. Sometimes there are marks left on the webbing. None of these were present in the photos she looked at.
-the photographs showed that the latch plate buckled and did not release with tension. This means the buckle was working properly at that time.
-the fluid staining on both doors was likely blood.
-the blood on the driver's side is likely where Mr. Elsworth ended up after the crash.
-the headliner showed scratches and marks that were sort of horizontal from right to left. That would indicate that Mr. Elsworth had moved across the headliner and left those marks. -there was what appeared to be a fluid stain above the right front passenger window where his head and face likely contacted. The window glass was fractured and gone. Mr. Elsworth likely struck his head there because the x-rays showed debris that was consistent with nuggets of glass, and so that is likely where he hit the right side of his head and face. You would not have expected this if Mr. Elsworth had his seat belt on, as the seat belt would have locked and maintained him in his seat. Even if he were to slip the shoulder belt somewhat, the lap belt would still keep him in place and he is just not tall enough to reach that area with his buttocks still in the seat.
Dr. Gwin testified that she did not inspect the vehicle herself, but she reviewed Mr. Vega's report and his deposition testimony. She reported that his accident reconstruction made sense and she found nothing of concern in the investigation.
She also reviewed radiological studies along with her colleague, Dr. Cynthia Day. She stated that they are consistent with her testimony. She indicated that they can look for evidence of seat belt marks using CAT scans in 3D images. Also skin surface and muscle tissue can determine if there is any evidence of seat belt usage. You would often find bruising, edema or swelling over the musculature and skin tissue over the clavicle or collar bone or the chest and sternum and the lap or pelvis where the belt was worn. There were no such marks on Mr. Elsworth, indicating there is no evidence that Mr. Elsworth was wearing a seat belt.
Dr. Gwin testified that "occupant kinematics" is where you put together the crash reconstruction, examine photographs of the vehicle and the scene, such things as marks on the road; together with the injuries to determine where the occupant was in the vehicle and determine how the occupant moved in the crash.
She testified that she was able to use able to use kinematics to determine Mr. Elsworth's body movement in the crash. She indicated that:
-as the vehicle rolled onto its right side, Mr. Elsworth would move toward the right side of the truck.
-because he was unrestrained, his head and face struck the passenger header as well as the roadway with the intervening fracturing passenger window.
-as the rollover sequence continued, and the vehicle rolled onto its roof then left side, Mr. Elsworth's body moved across the roof, and back to the driver's seat.
-as the vehicle came to rest on its wheels, Mr. Elsworth, having sustained a brain injury rendering him unconscious, was slumped to the left, partially outside the driver's window.
She further reported that:
- Mr. Elsworth's severe head and face injuries were the result of striking the passenger door header and ground with the intervening fracturing window.
-had he been wearing the available lap and shoulder seat belt assembly, he would have maintained contact with his seat, and likely would not have been able to reach the passenger door and window with his head and face.
-obviously the crash was the cause, without the crash there would have been no injuries.
-there was no evidence he was wearing his seat belt. This allowed him to be able to move across the vehicle with a lot of speed and force and strike the header above the right front passenger door as well as the window glass and that caused his head and face injuries.
-there was no evidence that the seat belt was not working properly.
-Mr. Elsworth's failure to wear his seat belt caused the severe injuries to his face and neck. Had he been wearing his seat belt he certainly might have some injuries but he would not have been able to strike the right side of the vehicle with his head and face causing the most severe injuries. His injuries were more severe due to not wearing his seat belt.
She agreed that if Mr. Elsworth was texting, this could cause inattention to driving.
Dr. Gwin was cross examined by the employee's counsel. She agreed that:
-she has not seen pictures of Mr. Elsworth's injuries.
-she is not a seat belt expert.
-the seat belt type that Mr. Elsworth had allowed for forehead movement.
-she did not inspect the truck herself and did not go to the accident scene.
-she does not know the exact position that the seat belt latch plate was on the webbing at the time of the accident.
-she does not know if someone moved the latch plate after the wreck. She said earlier that it was at the bottom of the seat belt webbing close to the floor.
-Mr. Elsworth is 6' 2".
Dr. Gwin testified that Mr. Elsworth had a couple inches of headroom above his head to the roof. When asked if the seat belt didn't lock then Mr. Elsworth's head would have contacted the front of the crushed cab, she replied that she did not do that analysis.
She further agreed that:
-scrapes and abrasions can also be consistent with seat belt use.
- according to some research, seat belts in some vehicles can release in rollover accidents. She added they do not release on their own.
-some of her opinions were based on Mr. Vega's accident reconstruction.
She testified that some of the things she relied on to say Mr. Elsworth was not wearing his seat belt were:
-the investigation of Mr. Vega.
-the lack of any evidence on the webbing.
-the lack of any evidence on the latch plate.
-the lack of any evidence on the D-ring.
-Mr. Elsworth's injuries.
-the marks in the vehicle including the roof and blood on the passenger side.
She reported that she did not get to actually see the seat belt but would like to if it were available. She says it is always better to look at the actual evidence but photographs can be nearly as good.
When questioned about the marks above the passenger window she testified that: -rollovers are complex to model.
-the passenger window was broken by colliding with the ground-not by Mr. Elsworth hitting it. Mr. Elsworth was there at the same time it was fracturing.
She also testified that due to the fluid staining she believes Mr. Elsworth was in the driver's seat probably slumped over when he was found.
Dr. Gwin testified that she does not know about CDL training but agreed that driver error is probably a factor in most crashes. She said she had no opinion about whether Mr. Elsworth was properly trained or not.
She further explained that she relied some on Mr. Vega's report but more on the things she looked at.
She says she provided a medical opinion, not an accident reconstruction opinion.