NEW : Suspected spree killer described as meth addict . Nicholas T. Sheley , 28 , did not enter a plea at first court appearance . Police say ex-con tied to eight killings over past week in Illinois , Missouri . Score: 6
NEW : Suspected spree killer described as meth addict . Nicholas T. Sheley , 28 , did not enter a plea at first court appearance . Police say ex-con tied to eight killings over past week in Illinois , Missouri . All eight victims died of blunt-force trauma to head , authorities say .