DOYLINE, La.—“Crinkle-cut fries are better than curly fries.” And with that, Officer Billy Collins got the last word in on a long-running household controversy. The joke was the last thing 17-year-old Danielle Collins heard from her father as she left the house to pick up the family’s dinner. A far different domestic dispute was unfolding at a nearby residence at that very moment. “At 5:45 p.m., we got the call that a suicidal guy with a gun was arguing with his wife and had fired a shot in the air,” Sgt. Coby Barton of the Webster Parish Sheriff’s Office said. “Billy got there three minutes before I did. The location was just 250 yards from his house.” The scene was in the 400 block of Green Tree Road, in the little rural village of Doyline, Louisiana, a community of 800 residents policed by a two-person department. That night, on July …