CLEVELAND (AP) — A medical examiner has identified the remains found in a bag in the backyard of a vacant Cleveland home last year as those of a 4-year-old boy.

Cleveland.com reports authorities said Wednesday that no one had reported Eliazar Ruiz missing. No criminal charges have been filed in his death. Cuyahoga County Medical Examiner Thomas Gilson hasn’t released a cause of death, but previously said the death appears “extremely suspicious.”

Police say a tip this month helped authorities identify the remains. DNA tests confirmed they are Eliazar’s. Investigators are looking into who was responsible for Eliazar at the time of death.

A man pruning trees in September 2017 cut open a garbage bag and found a complete skeleton inside.

The house had been vacant for several months after a fire.