SAN DIEGO -- Toxicology test results are in for a Huntington Beach man who was found dead in a San Diego alley.

But authorities said they shed little light on how Dane Chandler Williams died.

The San Diego Union-Tribune reported on its Web site Thursday that toxicology reports show Williams' blood level was .17 percent, more than double the legal limit for driving. The newspaper said the tests also found traces of drugs used in depressants and taken to induce sleep, relieve anxiety, ease muscle spasms and prevent seizures.

An autopsy conducted after his death showed no signs of trauma.

Williams was an intern at the Costa Mesa-based surf and skate clothing manufacturer Hurley International and was in San Diego to attend a sports trade show.