Testifying at Tepper's Common Pleas Court murder trial, Mascino's voice choked and tears ran down his cheeks as he told the jury of the frantic ride from the shooting scene to nearby Northeastern - which closed earlier in 2009.
"We were shaking him, screaming his name, trying to get him to respond," Mascino said.
At the darkened hospital, Mascino said he, his brother Bob, and friend Robert McClary loaded Panas into a wheelchair they found.
They moved along the hospital's perimeter trying doors until McClary managed to force one open, Mascino said.
Running through the empty halls, banging on doors and screaming for help, Mascino said they finally found security guards, who called an ambulance.
The ambulance took Panas to Temple University Hospital, where he was pronounced dead.
In the rear of a police car that took the Mascinos in for questioning, Joe Mascino said, he began crying.
"I kept telling [my brother], 'I'm sorry, I'm sorry I got you involved in this,'" Mascino told the jury. "He just put his arm around me and said not to worry about it."
Mascino, who admitted being among those involved in the melee leading to the shooting, was the final witness to testify Wednesday in the second day of the case against Tepper.
Assistant District Attorneys Michael Barry and Erin Boyle said they expected to finish their case Thursday morning.
Defense attorney Fortunato "Fred" Perri Jr. has not said if Tepper, 45, a police officer for 16 years, would testify. Perri has maintained that Tepper had been punched in the mouth and was being menaced by a group of young men when he shot Panas.
Earlier Wednesday, a Philadelphia police Internal Affairs officer testified that he believed Tepper was intoxicated when the off-duty officer shot Panas.
