The man accused of killing three officers in a shooting that happened in North Codorus Township in York County, Pennsylvania, on Wednesday was being sought by police after allegedly peeping into an ex-girlfriend's home while armed with a rifle, a source confirmed with NBC Philadelphia .

Court documents say he was facing charges of stalking, criminal trespass and related offenses due to the incident.

According to court documents, a woman reported to police that her ex-boyfriend, Matthew Ruth, 24, of Hanover, had been seen peeping into her property along the 1800 block of Haar Road within North Codarus Township with a pair of binoculars on Tuesday, Sept. 16, just one day before the deadly shooting occurred.

Northern York Regional Police Department's daily police logs, which are posted

See Full Page