The daughter of Whitney Houston and Bobby Brown was found unresponsive in her bathtub Jan. 31

Credit: AKM-GSI

As Bobbi Kristina Brown remains on life support, Georgia police confirm they are conducting a criminal investigation into the night she was discovered lying unconscious in her bathtub.

“The incident has always been under criminal investigation and has not been reclassified as a criminal investigation,” the Roswell Police Department said in a press release Wednesday. “Criminal investigations may or may not result in criminal charges being brought against individuals.”

Authorities have confirmed that they’re “still on scene investigating the incident.”

Brown, 21, is still in the hospital after being found unresponsive Jan. 31 by Nick Gordon, the man she called her husband but never legally wed, and friend Max Lomas.

“Foul play is being investigated, including drug use and possibly cover-up to remove evidence from the crime scene,” a family source told PEOPLE last week.

But authorities are not releasing any more information as they try to determine how the daughter of singers Whitney Houston and Bobby Brown ended up in a scene echoing her late mother’s tragic death exactly three years ago.

More on Bobbi Kristina Brown:

Bobbi Kristina Brown’s Family Holds Vigil, Asks for Continued Prayer
Bobbi Kristina’s Cousin: We’re Still Praying, ‘Though Doctors Don’t See Any Hope for Change’
Family Gathering to Say Goodbye to Bobbi Kristina Brown
Max Lomas, Who Initially Found Bobbi Kristina Brown Unresponsive, Just ‘Wants His Good Friend Back’
Houston Family Had Restraining Order Against Bobbi Kristina’s ‘Husband’ Nick Gordon
Bobbi Kristina and ‘Husband’ Nick Gordon Were Never Married
Bobby Brown’s Bedside Song to Daughter Bobbi Kristina: ‘The Greatest Love of All’
Were Drugs Involved with Bobbi Kristina Brown’s Near-Drowning?
Kevin Costner on Bobbi Kristina Brown: ‘I Can’t Imagine’ What Her Family Is Going Through
Bobbi Kristina Brown’s Family Keeping Hospital Bedside Vigil
Bobbi Kristina Brown Is ‘Fighting For Her Life,’ Family Says
For Bobbi Kristina Brown, Minutes Without Air ‘Could Be Grim’
Bobbi Kristina Brown Is Still Unresponsive, According to Source
Do Bobbi Kristina Browns’s Social Media Accounts Hold Clues About Why She Was Found Unresponsive?
Bobbi Kristina Brown: Inside the Troubled Life of Whitney Houston’s Daughter
Bobbi Kristina Brown Hospitalized After Being Found Unresponsive in Tub
Stars Rally Around Bobbi Kristina Brown
Bobbi Kristina’s Husband Is Not the Bad Guy, Says Source
Bobby Brown ‘Inconsolable’ Over Bobbi Kristina’s Hospitalization
Bobbi Kristina Brown Recovery Would Be a Miracle, Says Source