Anchorage police have arrested a man involved in a crash which killed a motorcyclist last summer, saying he was impaired by marijuana during the collision.

Christopher Turkette, 41, surrendered himself to APD officers soon after a statement Wednesday afternoon that he was sought on charges of manslaughter, reckless driving and marijuana-related operating under the influence, police spokeswoman Renee Oistad said.

"He called in and we went and picked him up," Oistad said.

The Aug. 8 crash, which killed 30-year-old Douglas J. Bittinger at the Old Seward Highway and Dowling Road, occurred when Bittinger’s Ducati motorcycle headed east on Dowling with a green light. Police said Turkette’s 2005 Chrysler Pacifica, headed west on Dowling and making a left turn south onto Old Seward with a flashing yellow arrow, struck Bittinger in the intersection; he was declared dead about 10 minutes later.

According to the warrant, officers at the scene saw “signs of impairment” in Turkette. Testing of blood samples taken from him showed quantities of active THC and carboxy-THC in his system.

“The subsequent investigation indicated that [Turkette] failed to yield to the motorcycle, causing the collision,” police wrote.

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