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Now, he must win over a jury who will decide if this Hollywood star took on a real-life role in a police killing.

"I hope they aren't fooled by his fame. He's an actor. He's acting on the stand just like he did in the movies," said PBA President Pat Lynch.

Brancato's attorney's said his testimony was real.

"He's got nothing to hide, obviously not proud of that night," said Defense Attorney Joseph Tacopina.

That night, in December of 2005, off-duty officer Daniel Enchautegui was killed. Brancato testified he didn't know his friend Steven Armento had a gun that night.

He said the only reason they were in the neighborhood was to get some prescription pills from a friend -- to ease their pain from a crack and heroin high.

Brancato testified that he'd had open access to his friend's home and pill chest for more than a decade, but on that day he couldn't get in and his calls and knocks went unanswered.

Brancato said he accidentally kicked in a window while trying to get his friend's attention. When that didn't work, he said he planned to leave, but then he was shot, and so was officer Enchautegui.

"He had no knowledge of a gun and the evidence is certainly proof of that," said Defense Attorney Steven Toreno.

"He participated in the killing of a police officer. He knew there was a gun. Everyone he associated with were animals," said Lynch.

Armento is serving life in prison for killing the officer. Prosecutors said Brancato has a knack for making fiction look real, but the defense said this is no act.

"It's hardly a film, hardly a movie. He's fighting for his life," said Torano.

Brancatos defense team said this case comes down to his state of mind during the incident so they wanted the jury to hear directly from Brancato.

Closing arguments are expected Tuesday and the jury could begin deliberating as early as that afternoon.