By Debbie Emery - Breaking Celebrity News Reporter

Sons Of Anarchy star Johnny Lewis was not on drugs at the time of his death following the alleged murder of his 81-year-old landlady, according to a coroner's report.

The 28-year-old troubled actor died from traumatic injuries after plummeting 15 feet and two stories from the terrace of his Loz Feliz, Calif., home on September 26 and his death has been determined accidental, reported the Los Angeles Times.

"We do not have definitive evidence that (Lewis) intended to kill himself," revealed the report from the LA County coroner's office that was released on Thursday night, which also revealed that there was no indication that he was pushed and police believe he fell while trying to flee from the bloody crime scene.

Lewis "jumped over a wrought iron railing at the top of the terrace to a driveway below during his attempt to flee the location," the report concludes.

The autopsy report also noted that Lewis had nail marks on both sides of his neck when he died and had suffered partial strangulation.

As Breaking Celebrity News previously reported, it had been rumored that the Scientologist was on the synthetic party drug Smiles on the day that he allegedly bludgeoned Catherine Davis to death and ripped apart her cat.

Toxicology results on Lewis found no traces of cocaine, alcohol, marijuana or any other types of drugs in the actor's system though. Officials checked for anti-psychotic drugs as well as psychedelic drugs, however the new generation of designer drugs, which include Smiles, bath salts, K2 and spice, are notoriously difficult to test for due to their everâ€