Arraignment for a Pike County, Illinois murder suspect is scheduled for Tuesday.

28-year-old Joseph Coffman of Fort McDowell, Arizona is charged with murder in the stabbing death of his half-brother, 47-year-old Dennis Coffman of Hannibal.The incident allegedly took place July 19 as the two men were driving along a stretch of Interstate 72 near the Hull exit just east of the Mark Twain Bridge at Hannibal.

Coffman remains in the Pike County Jail at Pittsfield.