Law & Order Episode 15.12 Mammon

SLAYING OF WEALTHY HUSBAND HAS DETECTIVES POKING AROUND CARELESS WIFE -- AND HER BOYFRIEND -- Not long after a wealthy venture capitalist is found slain in his spacious home, Detectives Fontana (Dennis Farina) and Green (Jesse L. Martin) suspect the victim's feckless young wife (as Marley, guest star Andrea Roth) -- as well as the handsome contractor (as Tremont, guest star Daniel Sunjata) who installed the security system and was romantically dallying with the wannabe widow. On the legal side, A.D.A.s McCoy (Sam Waterston) and Southerlyn (Elisabeth Rohm) seek to turn the cheating wife against her ex-beau, but the bad boy's many "alibi girlfriends" and a second unexpected crime severely hamstring their prosecution.