Local police said there were "no obvious signs of criminal intent".[252] On March 22, 2012, office reported the cause of Houston's death was drowning and the "effects of atherosclerotic heart disease and cocaine use".[253][254] The office stated the amount of cocaine found in Houston's body indicated that she used the substance shortly before her death.[255] Toxicology results revealed additional drugs in her system: diphenhydramine, alprazolam, cannabis and cyclobenzaprine.[256] The manner of death was listed as an "accident".[257]