According to San Antonio police, a teenage murder suspect tried to convince investigators that a 16-year-old who lived in the same house with him fatally shot himself. Investigators said the suspect's stories and the evidence did not match up.

Jose Felinzo Carrion faces a charge of murder. The 18-year-old was arrested Wednesday. He is being held at the Bexar County Detention Center in lieu of a $100,000 bond.

According to the arrest warrant, police responded to a confusing call about violence in the 1700 block of South Hamilton Street. The initial call was for a stabbing. Then, officers received information the stepson shot himself.

Police said Ethan Elijah Carrion was found face up in the living room of an apartment unresponsive from a shotgun wound to the chest. He was pronounced dead at the scene.

According to the warrant, Jose claimed he was in a bathroom upstairs as Ethan played with the shotgun. Jose reportedly yelled at the 16-year-old for playing with the gun on the stairs. The murder suspect claims Ethan dropped the shotgun on the stairwell, the weapon discharged and killed the teen.

Investigators searched the apartment for the gun. They found casings from a 20 gauge shotgun but not the weapon. According to police, Jose said he gave the shotgun to a man he didn't know who happened to be in the area on August 26. Police said the remnants of Hurricane Harvey brought heavy rain to Bexar County. The chances of someone walking by in those conditions was next to impossible.

Jose changed his story, according to the arrest warrant. He told police he put the shotgun in a dumpster.

Investigators searched two dumpsters with no results.

A witness provided SAPD with a different perspective. The arrest warrant said Jose told the witness he was going to prison for the shooting. He also allegedly said he hid the shotgun in the bed of a pickup truck.

Ethan's mother, Elsa, said her son was lying on the couch next to her. She said he got up and went out the rear door of the apartment. Moments later she got the news her son had been shot. Jose, she said, was nowhere to be found.

Death investigators told police Ethan's wounds were not self-inflicted. Forensic investigators said a gunshot residue test revealed Jose had shot a gun.

Police believe he shot the victim in the rear doorway, tossed the murder weapon and lied on the victim to cover up the crime.

SAPD would not say if the victim and suspect are relatives.