>> bobbi kristina broke down in the hotel lobby and just was screaming over and over again "what's wrong with her, what's wrong with her?" so we can only imagine what is going through this girl's mind. but her mother was her world. >> i wanted everything to just stop. wait a minute. because what i felt was happening i didn't want to be happening. >> but there was no stopping it. a victim of their own addiction, toxicology tests revealed that houston had cocaine, xanax and marijuana in her body, as well as a muscle relaxant and benadryl. the los angeles county coroner determined the cause of death was accidental drowning with the effects of heart disease and cocaine use as contributing factors. the life built on triumph ended in tragedy.