There is no faster way to destroying amateur eligibility and putting a black mark on your reputation than accepting representation, vague promises of future representation, or benefits like housing (see Reggie Bush) or cars from an agent to a student-athlete or family. And with the immediacy and reach of social media any interaction by a student-athlete or family with an agent will get noticed.
The NCAA bylaws strictly prohibit this student-athlete/agent relationship under § 12.3.1.1 and .2. This includes both written and verbal arrangements and both present and casual promises of future representation after your son has completed his amateur eligibility in that sport.