CNN -- A tragic accident or cold blooded murder? That's what the California police are trying to figure out.
When Dean Riopelle died from a heroin overdose last September, it appeared to be a tragic accident. The case was closed....until police in California announced this week that model-turned-prostitute had been arrested.
Alix Tichelman is charged with the death of 51-year-old Google executive Forrest Hayes, a father of five.
Police say he, too, died of a lethal amount of heroin, and they say it was given to him by Tichelman, the 26-year-old he met on arrangement.com.
Georgia authorities have reopened the Riopelle case due to the similarities between the two cases.
What the investigators saw on the security camera the night of the Google executive's yacht brings up some concern.