What is your son's rate? My daughter is an IS (intelligence) and she called asking for more phone numbers and addresses up to a week before her PIR... if he is in a rate that needs higher security clearance, this may be why.
ha ha Chris..def had the same experience..!
Lilli - Since your son is a CTI, you might want to join the CTI group. Having to get a SBI security access is quite demanding. They have blazed this trail many times concerning the security clearance stuff.
or the CT group at: