_**A killer is on the loose in Texarkana in 1946**_ The Texarkana Moonlight Murders and the ensuing investigation that took place from late February to early May, 1946, are chronicled with the names changed and details altered for dramatic purposes. Ben Johnson plays a renowned Texas Ranger on the case and Andrew Prine a formidable deputy sheriff. Dawn Wells shows up in the last act. “The Town that Dreaded Sundown” (1976) is a crime docudrama that could be designated as an early slasher even though it’s based on a true story. The sack the killer wears on his head was the inspiration for the…