Considering his involvement in Iran-Contra and deliberate derailing of Congressional oversight, I wouldn't believe a word the current attorney general says.
Especially because the case disappearing is clearly convenient for people personally connected to the AG, or to whom the AG owes a favor.
Or maybe the attorney generals public statement is confirmed suicide, as to not be suicided himself, but meanwhile reaching out to uncorrupt allies that can investigate the murder wide-eyed-optimist-face?