SMB, any mention of suicide or self-harm has to be taken very seriously. I'd suggest getting him to a pediatric psychologist ASAP.

Often IQ tests aren't that accurate on kids who have behavior issues. Maybe you should pursue evaluation with a neuropsychologist or developmental pediatrician-- knowing what's going on will help you know what to do to solve the discipline and other issues, and maybe shed light on the IQ disparity.

DeeDee