STURGIS, S.D. (AP) — Preliminary autopsy results say a ship captain on the Discovery Channel television program "Deadliest Catch" who died in Sturgis, South Dakota, during its famous motorcycle rally had a heart attack.Meade County Sheriff Ron Merwin says an autopsy was completed Monday but he's still waiting on a toxicology report for 50-year-old Alaska native Tony Lara.The sheriff says he doesn't suspect the toxicology results will show anything that would have contributed to Lara's death.Lara died early Saturday morning at a private residence in Sturgis.A post on the Discovery website describes Lara as a veteran crab catcher.