The man charged in the deaths of three in a boat crash in 2024 in Old Saybrook rejected a plea deal offered by the state on Thursday. Clayton Hackling had to decide whether he would take the plea deal of 30 years, suspended after 15, with five years probation. Hackling rejected the offer, and the case is headed toward a trial. “He wishes to reject the states offer, your honor,” Hackling’s attorney said in court. Hackling was charged in the death…