Events of The Lost and Damned
Jones is never seen in the game, but he calls Johnny Klebitz twice, as an Unknown Caller.
Jones calls Johnny Klebitz for the first time after the failed drugs deal, and that Charlie, an under-cover officer who was in the deal and was killed in a gunfight with Niko Bellic and Playboy X, was a colleague of his. He offers to make a deal with Johnny if he comes in and gives information about The Lost Brotherhood, but Johnny declines the offer by challenging Jones to get a warrant if he's got any evidence on him.
Jones calls Johnny again after the last mission of Elizabeta Torres. He lets Johnny know he has a familiar friend who will testify against the Lost. After this phone call, he is never heard from again.