SALEM – A Lynn father who admitted selling twists of heroin and Percocet to an undercover officer to help support his addiction was sentenced Thursday in Salem Superior Court to three to four years in state prison.William Reardon, 28, of 69 North Common St., #20, pleaded guilty last month to charges of possession with the intent to distribute heroin and a second charge of distribution of heroin before Judge Timothy Q. Feeley.Sentencing had been delayed until after Thanksgiving so Reardon could spend the holiday with his family at the request of defense lawyer Christopher Norris.Feeley agreed to adopt the joint sentence proposed by Assistant District Attorney John B. Brennan and Norris.On the afternoon of Dec. 16, 2008, Reardon sold three twists of heroin for $100 to an undercover officer on Summer Street.Then at about 2:30 p.m. on Sept. 1, 2009, Reardon sold 50 Percocet tablets to the undercover officer for $150 on North Common Street before he was arrested.Norris said his client was addicted to heroin at the time and “that?s what drove him to engage in this.”?I don?t expect you will see Mr. Reardon in this court again,” Norris added, as he asked Feeley to impose the recommended prison term, saying it was “fair.”Reardon apologized to the judge, saying he knew what he did was wrong.Feeley carefully explained to Reardon because there is no probation supervision and support attached to his penalty when he gets out of prison he will have to use all the resources available in the community to make sure he does not go back on drugs.Reardon was indicted by an Essex County grand jury in October 2009.