A Los Angeles County District Attorney has been presented with evidence about the case - relating to the guarantee she would not release the tapes which see Mel threaten her as part of a child custody agreement for their two-year-old daughter Lucia - and will now decide if the Russian-born singer will face official charges. District Attorney spokesperson Jane Robinson told E! News: "Sheriff`s officials dropped off last part of the Mel investigation today. It`s under review." Being questioned is whether Oksana intentionally tried to gain $15 million in hush money to prevent the recordings from going public. Soon after signing the child custody agreement, Oksana reneged and the recordings appeared a few months later, although she has always denied her involvement. Discussing the taped phone call - which sees the `Braveheart` actor call her a "****" and a "f***ing selfish b***h" - last year, the 40-year-old star said she began recording when she was scared she would not make it "through the night". She said: "I started taping it around 11 o`clock because I thought I`m actually not going to live through the night. I wanted my mother to be able to prove that if I`m dead that this is who did it. "