Despite the defendant’s claim to the contrary, we conclude that the commissioner’s factual findings and the conclusions drawn therefrom adequately satisfy these criteria. The commissioner found that (1) the plaintiff had worked several years for the defendant and had a good work history, (2) after the plaintiff had quit his employment at the gas station, approximately one month before his discharge, the defendant persuaded him to return and allowed him to earn substantial amounts of overtime pay at the gas station, (3) *71although the defendant briefly discussed a customer complaint with the plaintiff at the start of his shift on the date he was injured, their relationship remained harmonious until the plaintiff telephoned him about his injury and the defendant realized that a workers’ compensation claim might arise and (4) the reaction of the defendant, when he received the note from a physician directing a suspension of the plaintiffs employment for three days, was highly significant in establishing that the plaintiffs discharge had resulted from the defendant’s concern about his liability for a workers’ compensation claim.2 Those findings are adequately supported by the evidence and sufficiently establish a prima facie case of a violation of § 31-290a (a). III