A 41-year-old Kennewick man was charged with first-degree premeditated murder for the homicide of an elite Anacortes-area dog trainer, though the victim’s body still hasn’t been found more than a week after he disappeared.

Skagit County Superior Court documents filed by Prosecuting Attorney Rich Weyrich on Friday morning outline new information that Michiel Glen Oakes planned the death of T. Mark Stover Oct. 28.

The evidence includes a receipt found in Oakes’ car from the Mount Vernon Wal-Mart dated Oct. 28 for three ankle weights, anchor line, a backpack, children’s shin guards and a camouflage sweat suit, court documents say.

Investigators found a backpack matching the one on the receipt in the car. The backpack included a single .22 caliber round and .22 gun silencer instructions, court documents say.

Oakes had a receipt on his laptop indicating that he had paid to attend a tactical school, the documents say.

On the afternoon of Oct. 28, hours after Stover was last seen, Oakes met up with his ex-wife in Everett. Oakes told her he was involved in a “job gone bad,” the affidavit says.

Oakes told her if police knew what was in the back of his car he would go to prison for the rest of his life, the affidavit says.