before he can testify, shayne austin hangs himself in a florida hotel room.ly need a break. there is no physical evidence linking the adams brothers or jason autry to the crime. even so, prosecutors charge all of them, including dylan, announcing they'll seek the death penalty. all three plead not guilty. and this guy actually believes them, the former agent in charge of the early years of the investigation, terry dicus. why don't you think these young men are guilty? >> i don't think they're capable of doin' arithmetic, much less this. >> reporter: but prosecutors are confident they can make it all add up. still ahead, the trial that rocked decatur county, a best friend's betrayal, and chilling story about what happened to holly. >> boom. boom. boom. >> reporter: stay with us. [ engines revving ] when you drop a 603-horsepower v8 biturbo engine into one of mercedes-benz's finest luxury sedans, what do you get? [ engine stalls ] you get out of the way. 0-to-60 in 3.3 seconds. the mercedes-amg e63 s sedan. need a fast absorbing try nivea in-shower body lotion.