Whitney Houston's adopted son gave her daughter 'Toxic Cocktail'

In a document, filed by the administrator of Bobbi Kristina Brown's estate, accuses Mr Gordon of giving Bobbi Kristina a toxic cocktail, rendering her unconscious, and then put her face down in a tub of cold water".

READ: Whitney Houston's daughter's casket photo sold to highest bidder

The 22-year-old aspiring actress Bobbi Kristina was found unresponsive in a bathtub at her Georgia home, she passed away last month after six months in a coma.

According to reports the lawsuit against Bobbi Kristina Brown's partner, Nick Gordon also claims that on the morning she was found unresponsive and face down in a bath tub, Nick had arrived home at six in the morning after "being out all-night on a cocaine and drinking binge. The pair had a loud argument before the incident, in which he called the 22-year-old a "whore" and a "bitch".

Read:Bobbi Kristina's partner on suicide watch

Nick Gordon was raised by Whitney Houston as an informally adopted son who later began dating Bobbi Kristina.

Watch Bobbi Kristina Brown's Funeral video.