Illegal immigration forum price tag estimated at more than $100KBy: PHILIP K. IRELAND - Staff WriterCARLSBAD ---- Who should pay when free speech isn't free? Mayor Bud Lewis says he thinks Sen. Bill Morrow should, and said he will bill the senator for an estimated $100,000 in police costs for providing security for a forum on illegal immigration last week. "We're going to bill Morrow for it," Lewis vowed Wednesday afternoon. The city has estimated that its security costs for the forum at $100,000, but the total bill for the Aug. 11 forum will probably be much more than that,...