While I agree with my colleagues that you might want to contact an experienced criminal defense attorney, your information is unclear. What proceding are you referring to? A preliminary hearing where suppression is never an issue. Why are you speaking directly to a "Justice" and why are they speaking with you concerning the case when you were represented?
The answer is "No". It will come up in a check of PennDot records. You created more trouble for your self by not contacting an experienced traffic attorney before you entered a guilty plea. I have had dozens of calls from people who "just paid the ticket" and then find out that they are facing points or a suspension. Getting that revoved or rescinded after the fact is far more difficult and expensive to do and some times impossible. Whatever the attorneys' fee is for representing you at a...
Mr. Morgan and Mr. Cooper are correct. Clerical errors happen frequently. Typically, they can be corrected by the Clerk of Courts but you should have your attorney (if you had one) contact the person in the Clerk's office who does the PennDot transmittals. If you did not have an attornery for your ARD, retain one now.
The short answer is probably "yes" depending on California law. But my colleagues have given you great advice. Contact an attornery in the location in California where the incident(s) took place. See if you can take care of the charges so that you don't have this hanging over your head for the rest of your life.
Mr. Sipio is correct in his advice. However, your statement about "a few" retail thefts is unclear. How many retail thefts do you have. A third retail theft conviction may me a felony of the third degree notwithstanding the value of the item(s) taken. A felony record may keep you from many job opportunities.
My colleagues are correct. Blacked out VIN numbers and tags are a signal flare for the police. I suspect that the balcked out VIN and tag are only the beginning of your problems. Get an experienced lawyer on board to represent your son.