Not only did your buddy know that person, your buddy was probably in on it. Sadly i was in on a scam exactly like that... did it to a close friend... now every time something bad happens to me i know its because i was a shitty friend... Worst part is my friend... is still friends with me, so i feel even worse...
Were you being flashy? Did you show off money/ product TO ANYONE? thats why i robbed my friend, cause he was a loud mouth, and constantly would pull up to everyone he knew and break out a roll of cash talking shit... so we fixed his problem... I know i was wrong for doing it but jealously is a real thing, and it can turn friends into enemies... just be careful... live... learn... smoke on!