Funeral services will be held Friday (May 26) in Madison, Tenn., for Grand Ole Opry star Billy Walker and his wife Bettie who were killed Sunday (May 21) when the van he was driving left the road and overturned on I-65, south of Montgomery, Ala. Two band members, Charles Lilly and Daniel Patton, were also killed in the accident. Joshua Brooks, the Walkers' 21-year-old grandson, remained in critical condition Tuesday at a Montgomery hospital. Visitation for the Walkers and Lilly will take place Wednesday and Thursday at the Hendersonville Memory Gardens Funeral Home in Hendersonville, Tenn. Services for Lilly are scheduled for Friday at Hendersonville's First Baptist Church. The Walkers' funeral will take place at the Cornerstone Church in Madison. Funeral arrangements for Patton are still pending.