Yesterday I posted a story about how a NJ State Trooper in Sparta opened fire on 3 teens who had mistakenly knocked on the home, getting the address wrong for a friend.

There’s some new details, including that the teens were detained for 9 hours before being released without being charged. The officer so far has not been subject to any discipline.

Oh, and the gun he used had a laser sight, and that was the first indication to the teens that something was amiss.

Trooper Kissinger Barreau told investigators he believed the teens were trying to break into his Sparta home, CBS New York reported. Police said they are investigating the shooting, but Barreau remains on active duty and hasn’t faced any charges.

One of the teens, 18-year-old Jesse Barkhorn, said he and his friends were dropping people off after a party Sunday. They mistakenly knocked on the trooper’s door, having mistaken it for a friend’s house, around 2 a.m., then ran back to their car after they heard a man screaming at them through the door.

As they turned their car around a cul-de-sac, they noticed a red dot following them in the darkness — and realized it was the laser sight of a firearm. Then they saw Barreau standing outside with his personal gun.

“At this point we’re freaking out, ‘It’s a gun, it’s a gun,’ ” Barkhorn said.

“I was like, ‘Dude, get out of here.’ “

As they drove away, the trooper gave chase and fired at least three shots at them, with one hitting the car’s front tires.

The cop says that he identified himself as a cop, but the teens say they never heard it since their windows were rolled up - and were trying to get away from a crazy dude who was pointing a gun at them.