she knew because sam moore was an addict himself.is wife convinced him to get help. ♪ 30 years later, performing at the apollo, he is reminded of nippy. the theater was a site of a memorial after her death, a death sam knows all too well was tough to prevent. >> if they want it, they going to get it. don, you got enablers. you even got parents. they know that their child is doing it. that person is the cash car. so what are they going to say? >> sam's wife joyce believes whitney's own family helped fuel her habit. >> members in whitney's family, immediate and extended that had their problems with drugs. >> the family declined to comment and did not respond to our questions about these claims. whitney's mother, gospel singer cissy houston talks about her daughter's drug abuse in remembering whitney. whitney's brother michael talked about it with oprah winfrey when he and his mother both gave their first interview since whitney's death. >> we played together. and everything that you're doing together as you're growing up. and then when