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MILTON, Ga. – It's a case that involves sex, drugs and an Atlanta-area prostitute. Alix Tichelman is sitting in a California jail, charged with manslaughter for allegedly injecting a high-profile Google executive with heroin and then standing by as he overdosed.

Now, police in Milton are saying they're re-evaluating the death of Tichelman's former boyfriend who died under similar circumstances.

READ MORE | Escort charged in Google executive's heroin death

Dean Riopelle's death in September 2013 was originally ruled a heroin overdose. Sound familiar? His girlfriend, Alix Tichelman, told police she found him lying on the floor. But after these latest developments, police are looking into her story again.

"Both subjects in these cases died of heroin overdoses," said Capt. Shawn McCarty with the Milton Police Department.

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Riopelle died two months before Google executive Forrest Timothy Hayes in a strikingly similar way. TIchelman was at Riopelle's house when she says she found him on the floor.

"She had gotten out of the shower and found her boyfriend, Mr. Riopelle, lying on the floor, unresponsive," said McCarty. "At the time, we had no reason to believe it was anything other than an accidental overdose, and that's actually how it was ruled."

Listen to Tichelman's 911 call when she found Riopelle lying on the floor:

Alix Tichelman called 911 when her boyfriend Dean Riopelle overdosed in September 2013. She is now charged with manslaughter in the overdose death of a Google executive.

But the case was never closed. And now due to the latest revelations out of California, the police department is re-evaluating Riopelle's death.

"We are going back making sure there was nothing we missed, no foul play involved," McCarty said.

We do know that the two had a rocky relationship. Just 11 days before Riopelle died, Tichelman was arrested for battery. According to the police report, she bit Riopelle's hand and tore it open. She was also accused of making false reports to police.

Less than two weeks later, her boyfriend was dead. And two months after that, she allegedly killed Hayes.

According to Tichelman's Facebook page, she graduated from Northview High School in Johns Creek in 2005. Her parents now live in California.

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