By ALEX BRANCH Parker County authorities say they are investigating the weekend fatal shooting of 36-year-old man in Weatherford.Sherriff's deputies found Robert Chance Gardner dead about 2:40 a.m. Saturday while responding to a reported shooting in the 100 block of Brim Street, according to a statement from Parker County Sheriff Larry Fowler.Investigators found a woman, a 46-year-old man and a 9 mm carbine rifle at the scene, authorities said.