An off-duty Philadelphia police officer suspected of driving under the influence injured two state troopers and a tow-truck driver yesterday when his vehicle crashed into a state police car on a shoulder of I-95, authorities said.

Quote from the article:

Officer Matthew Sharkey, 23, was detained on suspicion of DUI after the accident, which hurt Troopers Matthew Sheeran and Michael Sadowski, state police said. The agency is investigating the crash. Sheeran was in fair condition at Hahnemann University Hospital, according to a spokesman there. Sadowski was treated at Hahnemann for cuts and bruises and released. Sharkey also briefly received medical care there. The tow-truck driver was also treated at Hahnemann, but there was no word on his condition.

Source: Off-duty officer crashes - another DUI