Inman was arrested Wednesday and charged with capital murder. He is being held at Harris County Jail without bond.
Earlier this month, Inman told authorities he and a 13-year-old friend planned to rob a grocery store on August 14th, 1994. The store's clerk, Iqbal Ahmed, asked for identification. That's when Inman said he produced a large kitchen knife and stabbed Ahmed in the chest.
Ahmed died at the store. The two teens fled, and the case remained unsolved.
Ron Nissen, pastor of the Pentecostal church, said Inman told him about the stabbing several weeks ago. The pastor he encouraged the 29-year-old to surrender.