until a witness comes forward with a name dave shepherd who soon confesses to the crime. >> he's laying on the floor, not moving not breathing, nothing. i check his pulse in his neck. he's dead. >> reporter: he has no known connection to dr. sonar, but guess who he's best buddies with? dr. dixon. >> we just hit it off. >> it was an unlikely romance. dixon, a successful plastic surgeon, and shepherd a divorced con-man. >> he left his wife for her. you know she broke up his marriage and he just wanted i guessing payback. >> reporter: that meant getting rid of the man she loved. >> he wanted him hurt and then gradually ended up wanting him killed. >> reporter: police arrest dr. dixon for ordering the hit on dr. sonar. but who will the jury believe a respected plastic surgeon, or a con-man? in the first trial, shepherd reneged reneged, refusing to turn against his best friend. the end, the jury couldn't reach a verdict. but at the second trial, one of the hitman's daughters takes the stand. >> we all asked him how do you have money? and his words were i did some work for mike and he paid me