Kenneth Harrington, aged 59, was the boyfriend of Michele Maulucci, 60, and had no familial relation to her or her sister, Theresa Schrantz, 59. Both Michele and Kenneth resided in Lakeside, California, while Theresa lived in Las Vegas, Nevada.

Regarding Kenneth Harrington's prior interactions with law enforcement, publicly available reports do not indicate any previous contact with the police. The San Diego County Sheriff's Department has not released information about any criminal history or prior incidents involving him. The motive behind the tragic event remains under investigation.

Thank you for clarifying. It’s helpful to know that Kenneth Harrington had no prior known criminal history or law enforcement contact, and that there was no familial relationship between him and the victims. The ongoing uncertainty around the motive certainly makes this tragedy even more difficult to process. I hope the investigation can eventually provide some closure for the families involved.