Carrying a concealed weapon is at least a misdemeanor of the first degree, which is serious enough.  The switchblade might also be considered a "ballistic knife" which would make it "dangerous ordinance" under the concealed weapons statute, which is a felony (possible sentence of a year or more in jail).There are a number of things which can make a concealed weapons charge more serious, such as being part of a street gang.This is certainly a very serious matter, and your son needs an attorney.  If you need to find a lawyer, you can do that at http://attorneypages.com