As 21-year old Bobbi Kristina Brown continues remaining in a comatose status, Atlanta police have reportedly launched a criminal investigation into how the only child of Bobby Brown and the late Whitney Houston ended up unresponsive in her bathtub about a week ago.

What started off being initially viewed as a tragic homage to her mother, singer Whitney Houston, who drowned in a bathtub almost three years ago, is now showing indications of foul play. According to recent news reports, Bobbi Kristina Brown apparently sustained injuries before the bathtub incident.

Nick Gordon, Brown’s boyfriend, according to reports is a potential target in police’s investigation as Gordon who along with his friend Max Lomas reportedly discovered Bobbi Kristina face-down in the bathtub at her Atlanta home.

Bobbi Kristina Brown’s relationship with Gordon has been subject to  scrutiny from both family and the public. Shortly after Whitney Houston’s death in 2012, Brown revealed she was romantically involved with Nick Gordon whom her mother had taken in about 10 years earlier. Gordon had lived with the family since he was 12 years old.  Houston never officially adopted him — a fact Bobbi Kristina pointed to in defending their relationship on social media.

In an interview with Oprah Winfrey last year, Whitney’s sister-in-law, Marion “Pat” Houston, admitted the relationship “just didn’t sit right with me.”

“I always looked at them as being, you know, the brother-and-sister type,” Houston said. “I just did not see the relationship moving in that direction.”

As the only child of Whitney Houston and her ex-husband, singer Bobby Brown, Bobbi Kristina Brown is her mother’s sole heir — which might explain why some family members question Gordon’s motives for being with Bobbi Brown Kirstina so that he can lay claim to the fortune.

Despite their wearing rings and referring to each other as husband and wife in public and on social media, Bobby Brown’s lawyer said, in a statement to ABC News this week, that “Bobbi Kristina is not and has never been married to Nick Gordon.”

Even before last weekend’s tragic events, the Houstons seemed determined to distance themselves — and Bobbi Brown Kristina — from Gordon. Houston, who is married to Whitney’s brother Gary, is the executor of Bobbi Kristina’s trust fund. In April of last year, she obtained a restraining order against Gordon. According to the police report she filed, Gordon made threats against her and other relatives after she denied his request to increase Bobbi Kristina Brown’s monthly allowance. The court-issued protective order barred Gordon from contacting Houston or her “immediate family” for one year.