Translation of the hard to read part at the bottom of the letter. I think I got it all.
Mark wouldn’t call the police, because he would be charged with trafficking or worse. I told you I had agreed to stay quiet about it in exchange for the promise that he would stop selling and stop using coke. Much later, while we, you, me, Mark, and Marlena, were chilling, you asked Mark if he was still selling coke. Mark told you that he wasn’t, that Dell had made him promise not to, and his life was better for it. You asked how Dell could have made him promise. Mark told you, ‘cause of that Laura *****’, ‘don’t you know?’ even though you had heard from me that she had OD’d with Mark you shook your head and said you did not. Mark looked around for just a moment, then smiled and said he made me promise, cause he’s my ! always looking out for me. We were by the pool in the back yard at Maplegate. Mark said