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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 NBC10.

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

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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 s

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