. >> reporter: former los angeles police officer jerry winkle is a county commissioner up in idaho nowonce upon a time he was chris hall's friend. that was before a night of poker and booze, when he said hall made a disturbing revelation that he'd shot himself in the leg when he was a cop in order to get medical retirement benefits. >> chris had been drinking beer, and he came right out and told me that he had shot himself. >> reporter: but there was more. d.a. investigator tom dove had discovered a secret. not in chris's past but in cristi's. >> there had been infidelity in the marriage for six years prior, while chris hall was in custody in idaho. >> reporter: cristi's affair was relatively brief, years earlier, but she'd been in phone contact with the man just days before she died. had chris found out? impossible to know. but when investigator dove talked to cristi's co-workers at the clinic where she was an x-ray technician, several of them said they noticed a sudden change in her usually vibrant personality. one co-worker offered more. >> she told us that she was contemplating a d

. >> reporter: former los angeles police officer jerry winkle is a county commissioner up in idaho nowonce upon a time he was chris hall's friend. that was before a night of poker and booze, when he said hall made a disturbing revelation that he'd shot himself in the leg when he was a cop in order to get medical retirement benefits. >> chris had been drinking beer, and he came right out and told me that he had shot himself. >> reporter: but there was more. d.a. investigator tom dove had discovered a secret. not in chris's past but in cristi's. >> there had been infidelity in the marriage for six years prior, while chris hall was in custody in idaho. >> reporter: cristi's affair was relatively brief, years earlier, but she'd been in phone contact with the man just days before she died. had chris found out? impossible to know. but when investigator dove talked to cristi's co-workers at the clinic where she was an x-ray technician, several of them said they noticed a sudden change in her usually vibrant personality. one co-worker offered more. >> she told us that she was contemplating a d