Cops investigate boy's entry into Cincinnati zoo exhibit, gorilla's killing

CINCINNATI — Police said Tuesday they were investigating the circumstances surrounding a 4-year-old boy entering a gorilla's exhibit at the Cincinnati Zoo and the animal being shot to death to protect the child. A federal investigation is also planned. A federal inspection less than two months ago found no problems with the zoo's Gorilla World exhibit, but earlier zoo inspections reported issues including the potential danger to the public from a March incident involving wandering polar be