Bobbi Kristina Brown and Nick Gordon
Bobbi Kristina Brown and Nick Gordon lived together in their Roswell, Georgia home before she was found unresponsive in a bathtub Frazer Harrison/Getty Images

Nick Gordon has denied allegations that he caused Bobbi Kristina's 'wrongful death'. Earlier TMZ reported that the 22-year-old has been accused of murdering the only child of the late Whitney Houston and r'n'b star Bobby Brown, by giving her a "toxic cocktail" of drugs before leaving her face down in the bathtub at their Georgia home.

Bobbi Kristina passed away on 26 July 2015 at Atlanta's Peachtree Christian Hospice, almost six months after she was found unconscious. She was laid to rest beside her mother, who died in tragically similar circumstances at The Beverly Hills Hotel, California in 2012.

In June, Bobbi Kristina's conservator Bedelia C. Hargrove filed a $10m (£6.4m) lawsuit against Gordon alleging that he stole money from her and subjected her to domestic abuse. In a statement she told People magazine: "I have filed today an amended complaint against Nicholas Gordon adding a count for wrongful death and for pain and suffering. We will leave no stone unturned in seeking justice for Bobbi Kristina Brown."

According to Hargrove, police interviews with friend Max Lomas, who was at the town home on the day of the January 31 incident, revealed that Gordon had been 'out all-night on a cocaine and drinking binge.' The papers obtained by TMZ, claim Gordon and his girlfriend then "became embroiled in a loud argument" that ended in the master bedroom. "The defendant screamed at Bobbi Kristina accusing her of cheating, going so far as to call her a 'whore', a 'b****', and other names," the papers allege. "The argument lasted for about thirty minutes and then everything abruptly became quiet."

It is then that Gordon is alleged to have administered a "toxic cocktail" to Bobbi Kristina that rendered her unconscious, before putting her face down in a tub of cold water. He emerged from the master bedroom wearing different clothes.

Gordon's lawyers have now filed a response on Tuesday (6 September) to an amended complaint filed last month in a civil lawsuit vehemently denying the allegations of assault, battery, causing emotional distress and theft describing the claims as 'slanderous and meritless', according to People.

He has admitted that he went out on the night in question, and 'reviewed video footage and then had an argument with Ms. Brown and the he then changed clothes', according to People.

More about Bobbi Kristina Brown

Gordon is reported to have claimed that he had tried to resuscitate Bobbi Kristina but was unsuccessful. He added that 'others unsuccessfully attempted to resuscitate Ms. Brown'. He denied allegations of fraud, and that he had married' her or tried to 'control' and 'limit' her interactions with others so that he could benefit from her wealth.

Bobbi Kristina was the sole heir of her mother Whitney's Houston's £22 million fortune. Nick Gordon was welcomed into the Houston family aged 12, after his father went to prison. He was brought up as Bobbi Kristina's brother, but the pair later announced they were "married". Bobby Brown denied any marriage ever took place between the two.

Gordon, who was banned from attending the funeral, has reportedly visited the grave of his late girlfriend, three weeks after the she was laid to rest.

No criminal charges have been brought against Nick Gordon.