ST. LOUIS • Family and friends of Patrick McVey, an owner of the popular downtown Irish bar Maggie O’Brien’s, are hoping a $15,000 reward will bring answers in a murder case that has few.

McVey, 57, was found slumped over in the driver’s seat of his gray Ford Explorer on the side of Interstate 55 near Loughborough Avenue shortly before 6 p.m. Wednesday. Police say he had gunshot wounds and was dead at the scene.

But police believe he was shot hours earlier. They say he had been shot by an unknown suspect or suspects while driving south on the interstate at about 2:30 p.m. Officers said a witness helped them determine the time, but did not give any other details.

It’s unclear how the car and his body went unnoticed for more than three hours.