Jonesy is a former FBI agent-turned-bounty hunter/private investigator. He has a lighthearted personality and sense of humor during times when such qualities are rather inappropriate. Jonesy first appears in Season 5, Episode 15, "Christmas Comes This Time Each Year" in which he is sent to help Dylan recover his lost fortune by FBI Agent, Christine Pettit who originally posed as the girlfriend of Jack McKay before his staged "death" but was really an undercover agent.
With the help of Valerie and Dylan down in Punta Brava, Mexico Jonesy successfully leads the caper to reclaim Dylan's lost fortune from Kevin Weaver and Suzanne Steele. When Dylan tells Jonesy they need to also rescue Erica after the money was reclaimed Jonesy originally bails and says Erica was not part of the deal. Later, he breaks through a glass door in Kevin and Suzanne's mansion just in time to help save Dylan and Valerie from danger and they successfully rescue Erica and the money is secured.
Later, Valerie is disappointed with her payout for participation in the caper from Dylan and goes to Jonsey to seek more remuneration for her work. He agrees and gives her more money under the conditions that she work with him again on a case in the future and that she share on drink with him, to which she agrees and accepts the money.
Jonesy comes back in Season 6 to requests Valerie's services as part of their deal for her to pose as a prostitute in order to blackmail a politician who is going through a divorce with his wife. The wife wants pictures of her sleezy husband with a prostitute in order to presumably get a better settlement from the divorce. This time, Jonesy's caper doesn't go exactly as planned and Valerie gets arrested in the process. This happens in season 6, episode 11 "Offensive Interference".