A Bakersfield, California resident is the latest person to be facing prison time for aiming a laser pointer at an aircraft.

Barry Lee Bowser was convicted after a two-day trial, the Department of Justice announced on Wednesday. Bowser was the 13th person to be charged by federal prosecutors in the Eastern District of California, which has taken the lead in prosecuting laser strike" cases nationwide.

Bowser will be sentenced on September 28 and faces a maximum penalty of five years in prison and a $250,000 fine.

In Bowser's case, officers saw the laser coming from a commercial property and a motorhome in Sillect Avenue in Bakersfield, a semi-rural city in Central California. Bowser lived in the motorhome and later said he was testing out his laser pointer after putting new batteries in it, according to prosecutors. He took aim at Air-1, a Kern County Sheriff's helicopter that was providing support to police on the ground.

"The pilot experienced flash blindness and eye discomfort and pain that lasted several hours," prosecutors said in a statement.

It’s notoriously difficult for authorities to pinpoint where a laser strike is being fired from, particularly when fired at a commercial aircraft. But when fired against law enforcement aircraft (particularly helicopters that can easily hold their position in the air), it is far easier.

The new verdict comes just a week after an appeals court criticized Eastern District prosecutors for being overzealous in an earlier laser case, against a man named Sergio Rodriguez. Rodriguez, who had prior convictions, got a whopping 14-year sentence, but it was overturned on appeal last week.

Prosecutors had charged Rodriguez under two laws—the one barring aiming laser pointers at aircraft and a separate statute that penalizes willfully attempting to interfere with the safe flight of a helicopter.

That second law was designed for both "the Osama bin Ladens of the world" and people who know their actions are dangerous but don't care, the appeals judges ruled. Rodriguez was a "knucklehead," and the lesser crime should be enough to give him proper punishment, the court held. That case has been sent back to the lower court for re-sentencing.