CNN and TMZ reported today 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 today that Brown, who is in hospital in a medically induced coma, sustained unexplained injuries prior to the incident.
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.