An Ada County grand jury indicted Shawn Fisher on Tuesday, finding evidence that he used a .38-caliber handgun to shoot Matthew Mohler-Kerns in the head while their cars were in traffic on Franklin Road.
Boise police say they can find no connection between Fisher and Mohler-Kerns, who was driving home Feb. 19 from work at Murphy's Seafood and Steakhouse.
"In every respect, it appears (Mohler-Kerns) was an innocent victim," spokeswoman Lynn Hightower said Wednesday. "Every indication is he was sadly in the wrong place at the wrong time."
Minutes before, police say, Fisher shot into another car over a parking dispute near Vista Avenue.
Police have the gun used in the shooting. They also found five rounds of .38-caliber ammunition and an empty ammo box for .38 rounds in Fisher's Boise Bench apartment, according to search warrant documents obtained by the Idaho Statesman.
Court documents offer no motive for Fisher's actions. The indictment does accuse him of shooting and killing Mohler-Kerns with premeditation, but it does not say what constitutes the premeditation.
Fisher, 35, is being held in the Ada County Jail. He's also charged with felony counts of aggravated battery, aggravated assault, use of a weapon in the commission of crime and a misdemeanor count of kicking a police dog.
Police say Fisher rammed into a car and fired a bullet into its driver's-side door after a parking dispute at an apartment complex. Hours later, Fisher got into a confrontation with police. It ended with a police dog pulling him from behind a home in South Boise.
In between, Mohler-Kerns, 28, was found dead - not far from where the driver of the car from the apartment complex worked and from where he called police to report being shot at.
Police haven't said whether they suspect that Fisher followed the driver from Vista to where Mohler-Kerns was shot on Franklin Road at Benjamin Lane, not far from Cabela's and the Boise Towne Square mall.
The court documents support police reports that Fisher was intoxicated at the time of his arrest. Police say they found synthetic marijuana and amphetamine in his home when they searched it the next day. Fisher told police that he was taking lithium - a drug used to treat manic depression and bipolar disorder - along with "new age and research drugs," according to search warrant documents.
Fisher also told police that he had been "receiving threats from his Xbox from a secret society."
Fisher will be arraigned before 4th District Judge Ronald Wilper on Tuesday.
Patrick Orr: 377-6219, Twitter: @IDS_Orr