Bobbi Kristina Brown ''smoked crack often and did heroin'' in the weeks before her collapse, her former roommate has testified. The aspiring actress passed away in July, six months after she was found unresponsive in her bathtub and now court papers from a recently-taped deposition with Danyela Bradley - who was at her late friend's house when her lifeless body was discovered - have detailed her past drug use.Bradley said: ''She smoked marijuana, she probably smoked crack often and also did heroin. ''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... Nick [Gordon] smoked it more than her.'' However, Bradley admitted she had never seen Bobbi Kristina - the daughter of Bobby Brown and the late Whitney Houston - use heroin and said her hard drug use was infrequent. In documents obtained by RadarOnline.com, she added: ''When I was living with her, she had done it maybe, like, not often, like every two weeks or so.'' Bradley also admitted she didn't realise her friend had a drug problem until she moved into her Atlanta home in January 2015. She said in the deposition, which was given in relation to a lawsuit brought by Russell J. Eckerman, who was allegedly injured in a car crash involving her and Bobbi: ''When I had first lived with her, I didn't know that she actually had a problem with it until I had lived with her afterwards for a couple of weeks ... and after a few weeks she just didn't really hide it.'' Browns boyfriend Nick Gordon is currently the subject of a wrongful death lawsuit by the aspiring starlet's estate, who allege he injected her with a ''toxic mixture'' before leaving her in the bathtub. Nick has denied the allegations...