SALT LAKE CITY — Michael Aaron Jayne, age 43, is accused of smashing some type of liquid through a small opening in a closed jail door.

Jayne is accused of killing Santaquin police Sgt. Bill Hooser on Interstate 15 in May 2024. He was reportedly behind the wheel of a semitruck that hit Hooser.

Related: Man accused of killing Santaquin police Sgt. Bill Hooser requests new defense

He was charged with nine felonies , including aggravated murder. Jayne is being held in the Canyons location of Utah County Jail in a capital case.

According to police documents, on Nov. 10, Jayne was seen on video “propell[ing] an unknown liquid through a closed door at a uniformed Utah County Sheriff Deputy.”

Based on video from inside the jail cell, which police reference in their charging document, t

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