Welcome To Radioreference.com!
As you have no doubt already found out, Public Safety radio systems and the scanners used to monitor them are very complicated.
Luckily there are people like me around to help you out. I am widely considered to be a Public Safety Communications Expert in Wake County.
Most of Wake Counties Public Safety communications operate off of the
State of NC VIPER system in a digital format. Which means you are looking at paying anywhere from $300 to $500 for a digital capable radio that can monitor these communications. I would suggest looking at the digital models listed in the
Radioreference.com Wiki. If you or your son decides to purchase a
Uniden BCD396XT (Handheld) or
Uniden BCD996XT (Base/Mobile) I can help yall get it programmed with a starter database file of public safety comms in Wake County.
Feel free to email me if I can help yall out further.
Happy Monitoring!
Marshall KE4ZNR