Officials say a man pleaded not guilty in a Clay County murder case this week during his arraignment. Troopers say 49 year old Zernon Gray was arrested March 31st for murdering 68 year old Lawrence Sizemore on July 13th, 2015. Investigators say Sizemore was found dead in his home in the Sextons Creek area. They believe Gray killed Sizemore before setting the house on fire, possibly to cover up the crime. Gray was charged with murder and first-degree arson. After pleading not guilty, his pre-trial was set for August 6th.