Joseph Wisdom, 33, was charged with unlawful use of a weapon, second degree murder and armed criminal action. His bond was set at $25,000 cash only.
According to Butler County Coroner Jim Akers, the victim is 50-year-old Stahl Sturgeon of Doniphan.
He said Sturgeon had multiple gunshot wounds to his chest and neck. An autopsy is scheduled for Wednesday, March 9.
Butler County Sheriff Mark Dobbs said it appeared all the victim did was offer a stranger a ride.
Deputies say Wisdom was acting paranoid and his family was trying to take him to the hospital.
Authorities believe the victim, Sturgeon, pulled over to help the suspect, who then convinced the man to give him a ride.
According to Dobbs, they got a call just before 7 a.m. about a shooting incident south on 67 on the northbound side of the highway.
It’s believed the suspect shot and killed the driver after some kind of fight in the car.
Dobbs said Wisdom also reportedly shot at other vehicles.
Around 7:30 a.m., Poplar Bluff police became aware of a black Camry in the Walmart parking lot with a man’s body inside.
Poplar Bluff Police Chief Danny Whiteley said Wisdom ran into Walmart, where police arrested him in the front lobby.
Butler County deputies say Wisdom walked into the Walmart and laid on the ground.
According to Poplar Bluff Superintendent Chris Hon, the junior high school was put on lock down as students were arriving between 7:20 and 7:40 a.m.
The students were held in the gym as a precautionary measure. Hon said the students were never in danger.
According to Hon, the students were allowed to go to class after police notified the school that a suspect was in custody.