. >> reporter: michelle williams mom nalted for a golden globe did the reshoot for $80 a day, while mark wahlberg's team noesht negotiated a 1$1.5 million fee and williams wasn't told she'd be making 1%. billy eichner calling it shameful. judd apatow says it's so messed up it's almost hard to believe -- almost. they say they had nothing to do with pay negotiations. no comments from wahlberg's reps or williams'. >> i guess it's day. wahlberg is known as a shrewd negotia negotiator. the manager has a reputation of driving a tough bargain. >> i think that's tough timing. i don't think anybody's really that surprised either. >>> coming up, the confessions of a killer. >> a former hitman and his decades of brutal murder. why he's now apologizing. that's next. >>> a former hitman for a mexican drug cartel, a rival of el chapo is coming clean about living most of his life brutally killing people. >> he's now reformed and is even asking his victims' families for forgiveness. we're up all "nightline" with nick watt. >> reporter: corona, a hitman for a mexican cartel tries to explain what it's lik