Homicide detectives in Fullerton, Calif., are investigating the fatal stabbing of a homeless man. The victim was discovered dead July 25 when police were called to the 4000 block of South Lemon Street about 6 a.m. to check on a man lying on the sidewalk. Police are asking anyone with information to call Fullerton Police Det. C. Hines at 714-738-5334. Those wishing to give an anonymous tip can call Orange County Crime Stoppers at 1(855) TIP-OCCS or visit www.occrimestoppers.org.