McGuirk admitted in court Tuesday that he spent four hours drinking at a Route 1 bar before getting in his car on Aug. 22.
At 3:30 a.m., he ran two red lights in Woodbridge, broadsiding the patrol car of Officer Thomas Raji, a 10-year police veteran whose wife was expecting their first child. A second officer and a prisoner they were transporting were injured.
Under the plea deal, a charge of aggravated manslaughter will be dropped.
Sentencing is scheduled for Aug. 17.
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