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Layton police are trying to determine if drugs played a role in a fatal auto-bicyclist crash last fall.

LAYTON — Layton police are trying to determine if drugs played a role in a fatal auto-bicyclist crash last fall.

On Oct. 8, David Long, 41, of Layton, was riding east on a wide shoulder of state Route 193 near Fort Lane about 9:30 p.m. when a woman driving in the same direction went into the bike lane and hit him from behind, according to police.

The 39-year-old woman told police she was traveling 50 mph in a Kia Soul "when she adjusted her in-dash vehicle heater and collided with something she had not previously observed," according to a search warrant affidavit filed in 2nd District Court last year.

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"During an interview with (the woman), she stated she was attempting to locate a friend's address in Layton and intended to turn at the next traffic light (Fairfield Road), which is approximately a half mile to the east," the warrant states.

Now, according to a second warrant unsealed Wednesday, detectives are also checking whether drugs were a factor in addition to distracted driving.

According to the warrant, toxicology tests revealed "that there were amphetamines and methamphetamines in her system."

The warrant was to determine if the woman had a prescription "for any medications which would cause the positive results," the warrant states.

As of Wednesday, the woman had not been charged.