HARTFORD, Conn. (AP) — The office of Connecticut's chief medical examiner has confirmed that toxicology tests on the body of the Newtown school shooter did not turn up any drugs or alcohol in his system.

The Associated Press reported in May that no alcohol, illegal drugs or prescription medications had been found in the system of gunman Adam Lanza.

The medical examiner's office said Tuesday that the full report indicated the tests were negative. The report was cleared for release months ago with permission from Lanza's father. The findings were first reported Tuesday by The Hartford Courant.

Lanza gunned down 26 people at Sandy Hook Elementary School on Dec. 14 before committing suicide.

Authorities have said prescription records were found in Lanza's home but have not disclosed the contents of the documents.