my 18 yr old son was picked up written a summons for marijuana possession. Should we have representation? It's his 1st offence

A first offense of marijuana possession carries a maximum punishment of 30 days in jail and a $500.00 fine.  Beyond that, though, the court must suspend the defendant's driver's license for six months upon conviction.  A drug conviction can also affect your son's eligibility to receive federal student aid, if that is a concern to you. You and your son should consult several experienced criminal defense lawyers in your area.  Many offer free consultations, and it is certainly worthwhile to get more information as you decide how to proceed.