AUGUSTA — A city man arrested Thursday in Key West, Fla., is charged with two alternative forms of murder in the slaying of his roommate, David Cox.

A grand jury in Kennebec County indicted Michael Thomas Young, 40, on a charge of intentional or knowing murder or depraved indifference murder, which are alternative forms of the same crime.

The indictment, which was unsealed Monday, came on March 22, more than eight months after Young called police to report Cox was dead in their Green Street apartment.

Cox, an Army veteran, was reportedly stabbed in the chest June 11 in Augusta. The men had lived in Augusta for about two years, and neighbors said they heard the men argue frequently and believed they were in a same-sex relationship.

Young was questioned by police following Cox’s death, but no charges were brought at that time and Young was not identified as a suspect.

The murder case in Kennebec County Superior Court has been specially assigned to Justice Michaela Murphy.

Young is being held without bail on the murder charge at the Stock Island Detention Center in Monroe County, Fla., and Maine police are arranging to bring him back to the state.

Records of the Monroe County Sheriff’s Office show that Young was arrested at the same 15th Court, Key West location on Nov. 10, 2007, on a misdemeanor offense.

Last Thursday, police said he was found hiding in a shower at the Poinciana Trailer Park.