The last several weeks of Bobbi Kristina Brown's life prior to her hospitalization were filled with drugs, including crack cocaine, heroin and marijuana.

Radar Online reports the new revelations are part of a recently videotaped deposition given by Brown's former roommate Danyela Bradley in a civil case filed by a man injured in a car crash involving Brown and Bradley. The news could help Bobbi Kristina's embattled boyfriend Nick Gordon defend himself against allegations he played a criminal role in his girlfriend's demise.

Bradley also testified under oath that she lived with Brown and Gordon for a period in early 2015, during which time "she witnessed the effects of Brown's drug use firsthand."

Brown died under hospice care in late July, nearly six months after being discovered face down and unresponsive in the bathtub of the home she shared with Gordon. She has since been buried alongside her mom at a New Jersey cemetery.

"She probably smoked crack often, and also did heroin," Bradley said in added testimony. "When she would do the heroin she'd just be very sleepy, nod off, and very less talkative, kind of keep to herself. When she would smoke crack, she would just be not even talkative. She'd just be keeping to herself as well."

Attorneys for the man involved in the crash have now requested a full toxicology report for Brown, outlining as many as 15 different substances, including amphetamines, methadone and cocaine, as other drugs they suspect she may have ingested in the days before the accident.

Meanwhile, authorities have now launched a criminal probe into the circumstances surrounding Brown's death that reportedly targets Gordon as the primary suspect. In addition, the conservator of her estate Bedelia Hargrove has filed a multimillion dollar wrongful death suit against Gordon, which alleges on the day Brown was rushed to the emergency room, Gordon gave her a "toxic cocktail" that essentially rendered her defenseless.

Led by Casey Anthony's Florida-based attorney Jose Baez, representatives for Gordon have denied all the allegations.