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. riggs says a developing brain is most vulnerable. daily or near daily use can be associated with a six to eight-point reduction in their adult iq. you don t get that back. reporter: collins has a lot in life he wants to get back.
with marijuana when he was just 10 years old. by age 14, he was hooked. what did you get out of it? bad grades and trouble, pretty much. reporter: kicked out of school, he s been in and out of jail ten times in the past four years. when i was 14, that was the first time i got my first drug paraphernalia ticket. i had five possessions and 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 really realize even what was happening? like i didn t think it was possible to like become addicted to marijuana, i guess. the evidence is very clear that it s addictive. reporter: adolescent addictive specialist dr. paula riggs says one out of six kids who tries marijuana as a teenager will become addicted. she says compared to the 1960s, the marijuana sold today has a higher concentration of thc, a