What are the chnaces of jailtime for 1st time misdemanor for theft in laptop at philidelphia airport. Clean record, shared custoday, college, and job

Very low.  There is always a chance of jail time on a theft case depending on the particular facts.  If it was stolen from someone incredibly sympathetic, or if the laptop had state secrets it could be worse.  Sentencing is highly fact sensitive.  The guidelines call for probation.  I am surprised he wasn't offered a diversion program to keep his record clean.