Who—not what—killed Michael Jackson? Jackson's toxicology results are expected next week and the cause of death will "almost certainly" be a homicide, law enforcement sources tell TMZ. There is reportedly "clear evidence" that natural causes of death have been ruled out, and the coroner is expected to announce that Jackson was indeed killed. The LAPD has reportedly been investigating Jackson's death as a homicide for weeks. There's evidence that Propofol, a strong, intravenous anesthetic, may have contributed to his tragic end. Dr. Conrad Murray, whose Houston office was raided on Wednesday, is thought to have prescribed the drug and is now a leading suspect in the case.