CNN CNN Newsroom December 31, 2013 20:17:00
Possession of under an ounce. now i have, like, six drug paraphernalia tickets, five possession tickets. it slowly got worse. >> reporter: collins warns marijuana isn't as harmless as some may think. did you ever think you were going to become addicted to it? did you realize what was happening? >> i didn't think it was possible to, like, become addicted to marijuana, i guess. >> the evidence is very clear it's addictive. >> reporter: this adolescened ad addictive specialist says one of six will become addicted. compare to the 1960s, the marijuana sold today has a higher concentration of thc. r...