Must I include a shoplifting incident on my job resume?

When I was 14 I think, the summer before I entered high school, I was caught shoplifting at Walmart. I am 17 now and I am looking to get a job and I don't want to lie, but I don't know whether or not I have to include my shop lifting incident on a resume when it asks if I have been convicted of a crime. I googled it but I couldn't get a clear answer because other people had different circumstances than mine. I attempted to steal around $100 worth of merchandise, when I was apprehended at the door by security. It was and continues to be my only accident with the law. I have tried to block out the event from my mind so I barely remember anything. I know I signed some papers and my mom was called in. She signed some stuff and we left and after that all I had to do was pay a fine. I never went to court, so I never appeared in front of a judge or anything. It has been almost 3 years and I am wondering because I thought I read in my research, that after a year, if you are a juvenile then after a year of "good behavior" it will be cleared from your record. I don't mind if you judge me for a big mistake I made, but please only respond if you can give me some solid advice. I know I f-ed up and everything but honestly, I'm a good person (4.3 gpa, i am definitely college-bound, I took 3 AP classes and 2 honors classes this year with art being my only "easy" class) and I learned from my mistakes and I won't be doing it again. If i have to include it then fine, but I would prefer to be able to leave it off my resume. Thanks for any help.