NASHVILLE, Tenn. >> A Tennessee jury found a prominent prison reform advocate guilty of vandalism Thursday after he disguised himself as a construction worker to hide guns, handcuff keys and hacksaw blades inside the walls of a Nashville jail under construction.

Alex Friedmann was found guilty of vandalism over $250,000 in a case that a prosecutor likened to something out of a Hollywood movie. Much of it was caught on surveillance video and went undisputed. The prosecutor said the case ends on a cliffhanger, leaving it anyone’s guess as to what Friedmann planned to do. He did not testify.

“We don’t know: Who were those bullets intended for? Who was going to be stuck with that knife?” Deputy District Attorney Amy Hunter said during closing arguments Thursday. “Who was going to try to get something from the other side of the visitation booth, and what were they going to do with it? And why?”

Ben Raybin, an attorney for Friedmann, argued that the state was overcharging his client through its calculation of damages. He urged the jury to look to the law and only hold Friedmann responsible for the actual physical damages to the jail.

To arrive at a charge of vandalism over $250,000, prosecutors said the entire facility had to be rekeyed at a cost of just over $291,000.

Fellow defense attorney David Raybin noted that an early news release from the sheriff’s office said that between 85 to 100 locks would need replacement, while the final total included rekeying 1,800 locks.

The government also argued that Friedmann’s vandalism includes more than $300,000 in personnel costs incurred when sheriff’s officers reviewed thousands of hours of surveillance video. Nashville’s sheriff, Daron Hall, has suggested Friedmann was planning a massive jailbreak.