Online court records indicate that John Dalton Jr. served prison time for manslaughter in the 1998 death of his wife, Shannon Dalton.
Police are searching for a convicted killer they believe shot and killed three people in Omaha, Neb., Tuesday evening. Prison records say he was paroled in 2010.
Officers were called to a home in the 3900 block of N. 37th Street shortly before 8 p.m.to investigate a shooting Tuesday. Dalton Sr. and Jean Dalton were Dalton Jr.'s parents and Leonna was Dalton Jr.'s niece, according to Omaha police.
Police are still in the process of notifying the victims' next of kin.