Michael Anthony O'Neal Flemming is accused of fatally shooting a former coworker at a Seattle gas station around 5 a.m. Oct. 13. Investigators said security footage showed him moving between the station and a nearby 7-Eleven for about 30 minutes before entering the station and shooting the victim.

Authorities say O'Neal Flemming then traveled to Wisconsin. His mother, Rena O'Neal, 59, and her husband, Rodney Brushwood, 57, were found shot to death at their home in the 5500 block of Washington Road during a welfare check Monday. Kenosha police identified Flemming as a person of interest in their deaths.

Kenosha police said messages exchanged among family members indicated Flemming was in Chicago, where he was arrested.

Flemming was charged Tuesday in King County Superior Court in Seattle with first-degree murder with a firearm in the coworker’s death. Prosecutors reviewed the case before filing the charge. His bail was set at $5 million, and his arraignment is scheduled for Nov. 2.

Kenosha police said detectives will work with the Kenosha County District Attorney’s Office to begin extradition proceedings and pursue charges in Wisconsin. The Washington charge does not resolve the separate investigation into the two deaths there.

Court documents say Flemming had recently been behaving erratically and was believed to be experiencing a mental health crisis. The documents also state he had no known criminal convictions. The allegations have not been proven in court.