You can certainly make the city/county do their due diligence and track down the driver themselves....Or, you can make your son appear and take responsibility for his actions.
You might talk with a traffic attorney, if you intend to fight the case.
The above is not intended to be legal advice, but may be used for general information. Please contact an attorney for specific help tailored to your needs. www.figgardenlaw.com
First, you should not make any confessions on a public forum. Anyone including the state can review it. I have had clients who copied their driver's license and sent it back in saying it wasn't them. I have had clients who appeared in court and showed it wasn't them. I have had clients who have had the driver appear. I have know people who did nothing and waited for the state to serve them.
Get an attorney to deal with this. You do not want to make an error which would possibly cause your son to get issued the ticket.
Andrew Roberts (818) 597-0633/ (805) 496-7777