Washington (AFP) - Police have opened a criminal probe into the boyfriend of Bobbi Kristina Brown, US media reported, one week after the 21-year old daughter of late singing legend Whitney Houston was pulled unconscious from a bathtub.
CNN and TMZ reported Saturday that an investigation has been launched against Nick Gordon, who reportedly said that he found Brown non-responsive in the bathtub of their home near Atlanta, Georgia.
The incident appeared to have eerie echoes of Houston's fatal accidental drowning nearly three years ago in a Los Angeles hotel tub.
But news reports said Saturday that Brown, who is in hospital in a medically induced coma, sustained unexplained injuries prior to the incident.
The reports, which provided no details as to the nature of the young woman's injuries, say authorities reportedly are also suspicious because she was found facedown in her bathtub on January 31.
TMZ wrote that it was told by multiple sources that there is a history of violence between Brown and boyfriend Gordon and that police are looking into a possible altercation more than an hour before Brown was found.
Despite the couple presenting themselves in public as husband and wife, recent news reports said there are no official documents to show they were ever legally married.
Pop star Whitney Houston died in February 2012 when she was found in a bathtub at the Beverly Hilton Hotel in Los Angeles on the eve of the music industry's annual Grammy Awards show.
Coroners concluded that the singer died by accidental drowning, with cocaine use and heart disease as contributing factors.
People magazine and other media reported that Brown's grandmother, famed gospel singer Cissy Houston, 81, arrived in Atlanta late Friday to be at the hospital.
Gordon spent years being raised by Whitney Houston in her home and grew up alongside Brown although he was never formally adopted by the pop singer.
He and Brown revealed their romantic relationship after her mother's death.