Bobby Brown Continues to Blame Nick Gordon For Bobbi Kristina's Death

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Bobby Brown arrives on the red carpet at the BET Honors 2015 at Warner Theater on Jan. 24, 2015.

Bobby Brown is suggesting family friend Nick Gordon is to blame for the deaths of his ex-wife Whitney Houston and the couple's daughter, Bobbi Kristina Brown.

Houston was pronounced dead in February 2012 after being found submerged in a bathtub. Her death was ruled an accidental drowning. Brown was found unresponsive in a bathtub in January 2015. She went into a coma and died six months later. An autopsy couldn't determine if her death was intentional or accidental. Both women had drugs in their systems.

Bobby Brown Talks Letting Go of Bobbi Kristina on '20/20'

“We should have been better,” Bobby Brown said in the interview, for a special edition for 20/20. “We could have been better.”

Brown has joined a wrongful death suit against Gordon in his daughter's death. He tells ABC News: "It’s not a mystery to me. The same thing that happened to my daughter is what happened to Whitney ... There’s only one person that was around both occasions, only one person who says they were there to protect them ... and he didn’t.” However he refused to speak Gordon's name.

Bobby Brown's Lawyer: 'We Know Who Harmed Bobbi Kristina and His Name Is Nick Gordon'

Gordon denies having anything to do with Brown's death.

Bobby Brown’s new book, Every Little Step, will be released on June 13.