YORK, Pa. — On Wednesday afternoon, three police officers were killed, and two others were injured in a shooting in North Codorus Township, York County.

The officers were killed Wednesday while following up on a domestic-related investigation that began on Tuesday. Two more officers were wounded in the shooting and police killed the gunman.

What we know about the shooter:

The man who fatally shot three Pennsylvania officers and injured two before he was killed by police has been identified as 24-year-old Matthew James Ruth, according to a law enforcement official.

The official spoke on condition of anonymity to the Associate Press because they weren’t authorized to discuss an ongoing investigation.

On Tuesday, Sept. 16, a woman observed Ruth stalking the house in a cornfield close by,

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