The suspect in the fatal freeway shooting of a high school girl just outside St. Louis is being investigated in connection with a second roadway shooting, federal court documents show.

Willie Herndon, a 42-year-old from Arlington, Texas, is accused of killing 17-year-old Alyssa Wilson on Oct. 14 . In a federal complaint, investigators say a spent shell casing matching the one used in Alyssa’s shooting was found close to where a vehicle was struck on another freeway three days earlier.

No one was reported injured in the Oct. 11 shooting in St. Louis proper. The federal complaint, filed in U.S. District Court for the Southern District of Illinois, states that a vehicle that had just exited Interstate 55 was hit by gunfire, and that security video showed a white SUV parked on the side of the interstate at the time before it “fled the scene immediately after the shooting.”

“A single cartridge case was recovered,” the federal complaint states.…