Advocacy groups are calling for a review of a convicted sexual predator's case in response to reports that a man with the same name was living in the Richmond, B.C., home where a teenaged girl died earlier this month.

Martha Jackson Hernandez, 17, and her 16-year-old friend Kayla LaLonde, died just hours apart on the evening of March 2 from a lethal combination of drugs and alcohol.

Hernandez's body was found in a Richmond house rented by a man named Martin Tremblay.

Hernandez family friend Marlene told CTV News that the Richmond house was known for its drug and alcohol-fuelled parties.

"He allows you to come over as long as you're under 16 years of age," she said.

In 2003, a man named Tremblay went to jail for sexually assaulting teenage girls. He was busted after videotapes were dropped off at an RCMP detachment -- those tapes showed Tremblay having sex with unconscious girls.

The victims were native -- many in foster care and under the age of 16. A witness told police that Tremblay had given the girls a mix of codeine, morphine and alcohol.

Before his release in 2004, the advocacy group Justice for Girls asked the Crown to vary Tremblay's probation order to prohibit contact with girls under the age of 18.

That didn't happen.

In 2004, Tremblay was sent back to jail again for two days on a drug possession conviction.

Carrie Humchitt of the Aboriginal Women's Action Network told CTV News that her group wants more information about any possible connection between Tremblay and the recent deaths of Hernandez and LaLonde.

"The community wants to know what happened to these girls and why was it allowed to happen," Humchitt said.

"These warnings weren't taken seriously and here we are again."

At the time of Tremblay's sentencing on sex offences, no sex offender registry existed. It appears that no one was monitoring Martin Tremblay.

"Is he on a sex offender registry?" asked Annabel Webb of Justice for Girls. "If not, why isn't he? I would like to know from Crown why they didn't feel compelled to put that no contact with children on his probation order."

Both Justice for Girls and the Aboriginal Women's Action Network are now calling for a government review of the Martin Tremblay case.

With a report from CTV British Columbia's Lisa Rossington