I have a SQL Server 2005 Std (x64) with SP4 that has a procedure I cannot seem to kill. If I view sys.dm_exec_requests I see SPID 103 with wait_type of LCK_M_SCH_M, a status of SUSPENDED and command of KILLED/ROLLBACK. However the SPID doesn't go away. I can even do sp_who 103 and I see the SPID with KILLED/ROLLBACK. The SPID has a current wait_time of almost 20 hours since I killed it.
KILL 103 WITH STATUS ONLY returns 0% completed