My Son Almost Died

I don't even know where to start. My 16 year old is in a hospital room and almost died. This all started when he started hanging out with a 20 year old who went to the college he's trying to get into. My son is very shy and quiet and doesn't have a lot of friends so I was happy he made a friend, even if he was a few years older. My husband automatically did not like him. He kept telling me this boy gives him weird vibes. He said his father instincts are setting off alarms. I told him I actually carried our son so I think my instincts are a little stronger than his. After school my son went to see his friend and some other kids. I get a call a few hours later saying my son is in the hospital. Me and my husband go up there and my son's friend is looking nervous. So based on what I was told. My son has a peanut allergy and carries his epi pen on him. They bought some ice cream and when he went to look for his wallet that he dropped his friend put peanuts in his ice cream because he thought it would be funny. This next part makes me even more disgusted. One of the other boys pulls to the side and tells me that my son's friend got ahold of his epi pen and was holding it i the air saying "you want this". When he realized he was actually DYING he freaked out because I guess no one knows how to use a damn epi pen. He tries to leave when one the boys calls 911 because he doesn't want to get I trouble. I feel sick to my stomach. My son's "friend's" mom showed up and this 20 year old starts crying to her about how I'm gonna press charges and he's gonna get kicked out of college. She goes up to me to ask how my son is and I say "He's alive no thanks to your son!" This women says to me "That's good. Since he alive we don't need to press charges!" I just give her a look. She starts saying it was a joke and how he's a first generation baby in college and how he needs this. I walk away. She yells back at me "You have my son's future in your hands. Plz make the right choice" I tell her she better get her kid out of here before my husband comes back because he's gonna kill him. I go back to the room crying and my husband comforts me and our boy. I apologize for not listening to his instincts. I feel so fucking stupid. My son is sitting in a hospital. I should have listened to my husband...