Were you convicted? If you entered into a plea bargain or no prosecution agreement, then it's unlikely to be a conviction. If you were officially sentenced by a judge, then it can be a conviction.I got a minor in consumption of alcohol charge when I was in high school. When I turned 18 the record was "expunged".
The court said this means it is removed from my record and it wont show up on background checks. I had my employer send me the level 3 background check they did on me and it says I have no criminal records.
If I am remembering correctly, they also said this means I can put "no" if asked I have ever been convicted of a crime or arrested but I'm not 100% positive that this is what they told me.
Do I have to disclose to med schools that I have been convicted of a crime, especially those that ask if I have in a secondary?
Read very carefully what they ask for. If you are asked if you have ever been arrested, then it would be deceitful if you said no. It's unlikely they will find out, but if they do, it could be grounds to revoke your acceptance.
"Expunged" is an inaccurate term. There is always a record of your arrest and charge in the NCIC database. "Restricted" is more of a term. Judges, DA's, etc. have access to this information as do agencies that perform S/TS (secret/top secret) or SCI (specialized compartmental intelligence) background checks.
It's best to consult with an attorney on this.