HUNTINGDON COUNTY, Pa. – Police in Pennsylvania launched a manhunt for an “armed and dangerous” suspect Friday evening after a state trooper was gunned down while responding to a report of a protection-from-abuse violation.

State police say trooper Landon Weaver was killed around 6:30 p.m. at a home in Juniata Township, reported Fox News.

Law Enforcement authorities posted the following details:

The Pennsylvania State Police is searching for Jason Robison, 32. He is wanted for the homicide of Tpr. Weaver in Huntington County. The incident occurred on Bakers Hollow Road in Juniata Township. Robison should be considered armed and dangerous. It is believed that his hair is currently dyed purple. Anyone coming into contact with him should call 911 immediately.

Weaver enlisted in the Pennsylvania State Police in December 2015 and was assigned to the Patrol Unit in Troop G in Huntingdon. He’s the 97th member of the Pennsylvania State Police to be killed in the line of duty.

In the weeks before the shooting, Robison posted anti-police comments on his Facebook page, the Centre Daily Times reported.

“The only good cop is a dead cop,” he reportedly wrote in a Dec. 17 post that was deleted around 1 a.m. local time Saturday. The post included images of a police cruiser that had been involved in an accident and an injured officer, the newspaper added.

Robison has had many encounters with law enforcement. According to court documents he’s been arrested about a dozen times for charges ranging from simple assault to arson, according to Fox.

The remote area around where the shooting occurred has been closed off while police officers on foot, in cars and in a helicopter search for the trooper’s killer.

UPDATE: The suspect was tracked and killed in a confrontation with police. You can view details here.

(Feature photo is Jason Robison, courtesy of the Pennsylvania State Police)