What Would You Do? Is My Best Friend's Wife Going To Jail?

My best friend's wife did something stupid and sold some extra pain medication to a friend's son. For reference the son was 45, my best friend is early fifty's, his wife is a year younger than him and her friend is mid 60's. He found out after the fact and can't to me for advice. I was the closest person he knew that worked in law. I was an army medic attached to an mp unit in the national guard until 5 years ago. She said that she said that she'd offered it to him for free, because he said he was in pain, but he didn't have insurance, but he'd insisted he pay her. It was $100. She gave him 15 days worth of medications she'd saved up. She is supposed to take two pills a day, but sometimes she doesn't eat like she should, and she gets extremely nauseous with the medication if she hasn't eaten before taking her medication, so she had extra. Her friend's son came back 10 days later saying that he'd used everything she gave him. My friend told him that he wasn't getting any more from her and he gave him his $100 back. He came back another two times within thirty minutes. My friend's wife said that she was afraid of him. He made it very clear on the third time that he was not to come back again, however because of how erratic he'd been behaving(he was probably high at the time), he made sure to have a knife in his pocket in case he decided to attack him when he told him not to come back again. He died 3 weeks later of unknown as of yet causes. He believes it's drugs, although a toxicology hasn't come back. An autopsy revealed that he had an enlarged heart and liver but he didn't think those were his cause of death. My friend and his wife are worried because a. She'll lose her friend's friendship if she finds out about the medications and b. She'll face jail time if the police look at his phone which they took and find out that she gave him medications. She wants to stick her head in the sand as it were and wait to see what will happen, but he believes in being proactive and have her talk to a lawyer at least about this and see what they say to do. She won't hear of it though. What would you do? She's never done this before and she's had no problems with the law before. I agreed with him. Talk to a lawyer. Get ahead of it, but I've only dealt with UCMJ and never in a law enforcement capacity. I'm no legal authority.