A Fairbanks man is charged with trying to assault an Alaska State Trooper who was taking him into custody Wednesday evening, prompting the use of a Taser stun gun on the suspect.

Karlton Steward, 40, was ultimately arrested on charges including fourth-degree assault and attempted second-degree assault on a police officer, resisting arrest, disorderly conduct and misconduct involving controlled substances, according to an online dispatch.

Troopers spoke with Stewart, who was on probation and release conditions in two separate cases of misconduct involving controlled substances, at about 7 p.m. Wednesday in Fairbanks.

“Upon seeing [troopers], Karlton attempted to flee the area and attempted to pull a knife from his pocket as [troopers were] detaining him,” troopers wrote. “Adult Probations requested a search of his person, which yielded a bag of a white crystalline substance that tested presumptive positive for methamphetamine.”

A tip about Steward led troopers to contact him, according to spokeswoman Megan Peters.

“Troopers tried to talk to him but he kept trying to leave,” Peters wrote in an email. “The troopers then attempted to detain him and a struggle ensued. He never actually was able to pull out his knife.”

A trooper then Tased Steward, Peters said, which let troopers handcuff him. He was taken to a local hospital for evaluation before being arrested.

Troopers took Steward to the Fairbanks Correctional Center, where he remained in custody Thursday morning according to a statewide inmate database.