Bobby Brown's sister claims in a Facebook post that Nick Gordon is under investigation for attempted murder, after her niece and his partner, Bobbi Kristina Brown, was found unresponsive in a bathtub in her Georgia home in late January.
Leolah Brown addressed her post to Dr. Phil McGraw, who staged a supposed intervention with Gordon for an episode of his TV show airing Wednesday.
Brown writes, "Nick Gordon is under investigation for the attempted murder of my niece Bobby Kristina Brown. We have strong evidence of foul play. Until this investigation is completed by law enforcement, I would ask that you or anyone else not provide this individual a platform to spin this situation to his benefit."
"If Nick Gordon does not have the courage to speak with my brother Bobby Brown and/or law enforcement about what happened the day my niece's body was found in a bathtub, he does not deserve to have a platform to speak to anyone of your caliber until this investigation is concluded," she concludes.
Authorities have not said Gordon is under investigation for attempted murder.
In a promotional clip for the intervention, Gordon cries, "I miss Krissy and Whitney [Houston] so much. I want them back."
Gordon also tells Dr. Phil, "I hate Bobby Brown." He and Brown have not seen eye to eye recently; Gordon's attorneys have claimed Bobby Brown has prohibited him from being at Bobbi Kristiona's side.
Dr. Phil is seen asking Gordon whether he's been drinking a lot. A family source confirmed to ABC News on Friday that Gordon entered rehab following the intervention.
Bobbi Kristina Brown remains hospitalized in Georgia.
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