undercover cop kris nelson had a plan to set a trap to make frank believe he was about to be fingered-- >> a relative of nick's with a past of my own, not particularly liking cops, you know. i'm the one that can keep nick quiet. and what are you going to give me in exchange for that? you're going to give me money. >> reporter: afraid frank would recognize the trap and hang up on him, detective nelson elected to make up a very unthreatening persona. >> so i thought, well, i'll be uncle jon, you know, that his mother sent down from the bay area to see what's really going on and what's harvey got himself into. >> so uncle jon places a call to el cubano. >> hey, uh, frank? >> yes. >> frank, hey. hey, my name's john. >> now, to set the trap, he'd say nick needs money for a lawyer. >> he seems to think you or fred will help him out. he didn't want a [ bleep ] public defender. >> okay. >> frank tells uncle jon he knows nick, but -- >> he's more of an acquaintance. i don't, you know, i really don't have money to help him out. >> at first frank doesn't seem to take the bait. >> yeah, if i can