Bobbi Kristina Brown's ex-boyfriend says he is doing everything he can ''to cooperate with authorities.''

Max Lomas, who was arrested on January 14 for possession of a firearm, illegal Xanax and other drugs, including marijuana, with intent to distribute, ''is absolutely devastated'' that the 21-year-old aspiring singer is ''fighting for her life'' after he found her ''unresponsive'' in a bathtub at her home near Atlanta, Georgia last Saturday (31.01.15), and insists he had nothing to do with the tragedy.

The 24 year old's lawyer, Philip A. Holloway, issued a statement to UsMagazine.com, saying: ''Contrary to what's been reported, my client, Max Lomas, was the person who first discovered Bobbi Kristina and called 911. My client wants nothing more than to see a full recovery. He and Krissi have been friends for many, many years, and he is absolutely devastated and prays for her immediate recovery.

''It's been reported that his arrest in the middle of January might somehow be related; there is nothing further from the truth.''

Police have launched an investigation into the circumstances in which Bobbi Kristina was found after they allegedly discovered drugs during a second search of her property.

A source previously revealed that her 'husband' Nick Gordon, who also tried to revive her before paramedics arrived at the scene, moved out of their home on January 23 following an explosive argument, and police are investigating whether another person might have been in her house before he and Max discovered her face down in the bath.