Gregory Tyree Boyce's cause of death is yet to be confirmed publicly after he and girlfriend Natalie Adepoju were found dead in their Las Vegas apartment - as mystery surrounds their final hours.
The Twilight star and Natalie died on May 13, but news of their tragic deaths only broke last night. Their bodies were found inside the home Greg, 30, had moved into to help care for his mother, who lives elsewhere in Vegas.
According to TMZ sources, an unknown white powdery substance was found at the scene - but this is yet to be confirmed by the authorities.
Greg was supposed to be in Los Angeles, where his 10-year-old daughter Alaya lives with her mum. One insider told E!: "Greg's cousin woke up and noticed that Greg's car was still at the
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