Having provided all of the foregoing clarifications, however, we ultimately affirm the administrative law judge's award denying benefits in this case, because we are not persuaded that employee has met his burden of proving he suffered any identifiable trauma at work.
Employee testified that he fell down the stairs owing to inadequate lighting when leaving after his work shift on April 29, 2012, which ran from 4:00 p.m. to midnight. Employee initially testified that he was quite certain that he fell on April 29, 2012, but when confronted on cross-examination with the timesheet he filled out for the relevant period, employee agreed that it appeared that he did not work the 4:00 p.m. to midnight shift on April 29, 2012, but instead worked from 8:00 a.m. to 4:00 p.m. on April 29, 2012. Employee agreed that it was not dark at 4:00 p.m. The timesheet suggests (and we so find) that from April 16 to April 30, 2012, all of employee's shifts ended at 4:00 p.m.
Turning to the earliest medical treatment records, we find no mention of a workplace fall, on a stairway or otherwise. Rather, the May 9, 2012, record from St. Mary's Health Center suggests employee's left foot and ankle swelling and pain started 1 week ago "after having tight clothing around ankle," that "[t]he injury mechanism is unknown
(mossibly related to compression garments)" and that "[h]is pain began shortly after he removed these garments 1 week ago and noticed a red 'ring' around his ankle." Transcript, pages 194-95. The May 17, 2012, record from Dr. Tracy Reed suggests employee's left ankle pain and swelling "has existed for several days and began suddenly." Transcript, page 67.
We note the approximate one week lag time reflected in the May 9, 2012, St. Mary's treatment record from the onset of pain and employee's first seeking treatment for this condition. We note also that the only real explanation provided for this gap comes from the testimony of employer's medical expert, Dr. John Krause, who opined that employee likely suffered a non-work-related stress fracture, and that complaints of pain from such an injury would come on suddenly.
Considered individually, employee's failure to identify the specific date of his claimed injury or the absence in the contemporaneous treatment records of a history of a work accident would not necessarily be fatal to employee's claim. But when we consider all of these circumstances together, we are unable without speculation to make factual findings that would support a conclusion that employee suffered any identifiable "accident" as defined in § 287.020.2. We believe the legislature's requirement that an accident be shown to have taken place during a "single work shift" means, at minimum, that an employee provide evidence sufficient to support factual findings as to what happened and when. Here, there is considerable ambiguity regarding what happened, and a near total absence of any evidence to permit us to determine, with any reasonable degree of specificity, when employee suffered his left ankle fracture.
For these reasons, we conclude that employee has failed to meet his burden of proving he suffered an accident, and deny employee's claim.