A U.S. Customs and Border Protection (CBP) helicopter hovering over crowds of people at a Detroit protest on June 3 was struck multiple times by a green laser fired from across the U.S.-Canada border, officials said.
Petro said he initially maneuvered the helicopter in an attempt to prevent the laser strikes from coming directly into the cockpit, but the perpetrator didn't stop firing.
"The behavior of the suspect was recalcitrant," Petro said. "They knew what they were doing. They were aiming and adjusting their aim on purpose, with purpose to strike the aircraft repeatedly."
The CBP helicopter has special tools that can precisely pinpoint locations with help from local law enforcement.
"Once they started hitting us again we were able to immediately put our camera system onto the offending individual, and then we were able to record them continue to get us with the laser," Petro said. "This is great, direct evidence that will be used in courts and their prosecution."
The perpetrator, who police later identified as 22-year-old Ali Zuhair, was shooting the laser from Windsor, Ontario. He was charged in Canada with mischief, two counts of failure to comply with a release order and breach of probation order.
Petro said he suffered some eye irritation after the strikes but considers himself lucky that he was not blinded.
According to the latest data from the Federal Aviation Administration, there were over 6,000 reported laser incidents in 2019, up from 5,000 in 2018.
Lasers can be a threat to larger commercial jets as well.
In 2012, a JetBlue pilot suffered an eye injury after a green laser was pointed directly into the cockpit.
It is a federal crime to shine a laser into a cockpit of an aircraft. Offenders could be sentenced to up to 20 years in prison and pay a $250,000 fine.
ABC News' Sam Sweeney and Amanda Maile contributed to this report.