Search Results: advice on letting her down

About a year and a half ago my boyfriend of 4 years lost his battle with bipolar disorder. Aside from the mental illness factor, he was also selling drugs on a large scale and he knew the hammer was going to come down (his suicide was timed in sync with an arrest, which never occurred because that morning he was found dead by his roommate and 2 detectives). I found out many of the details of his situation after he was gone... He was 23 when he passed. Now his 16 year old sister, who is in many ways much like him, is selling marijuana. I found out when she sent a snapchat photo of a bag of bud and some quirky statement about it last night. (Just some background: their family is so screwed up, divorced parents, kids from previous marriages who are now in their mid to late 30s, who are totally out of touch, a father who is totally oblivious and a mother who loves her unconditionally even though the daughter is borderline abusive toward her.) I considered sending the photo in a group message to both parents and letting them handle it, but I don't believe that they are capable, partly because she won't listen anyway and partly because they were completely ineffective in helping her brother. The little sister knows her brother did some illegal stuff (she had just turned 15 when he died) but most of the details have been kept from her. In the mean time, her brothers best friend is still awaiting his own legal decision. It's entirely possible that he could be imprisoned for up to 20 years. I find it infuriating that she has the audacity to sell drugs knowing what her brother went though (but then it always comes back around to the question "how much does she really know?"). I plan to confront her about the situation tonight, though depending on how she reacts I may wind up telling her parents. I don't want to scare her or give her too much info about her brother, but I NEED to at least try. I made him a promise to look out for her... But how? I need advice.