Lagrua was arrested and charged with two counts of murder and animal cruelty.
"It shocks everyone that someone could be that heartless and brutal and cold," said Mayor Lawrence Ponder, 74.
"When you hear these things, you have to accept it and say move on and hope it doesn't happen to you," he said. "It's everywhere."
Forty-five minutes after Marshall police took the call from Lagrua's house, officers in Jacksonville, North Carolina, near the Atlantic coast, arrived at the Liberty Crossing Apartments. The complex is about seven miles from Camp Lejeune, a Marine Corps base, and authorities had been called about a disturbance, according to a news release.
They found Lance Corporal Randall Buford, 21, dead from a bullet to the head. He had come back in June from six months in Afghanistan.
Officers arrested Lance Corporal Marcus Bo Hunt, 19, and charged him with one count of murder, according to the release.
That evening in Las Vegas, Jessica Kenny went to work at the Excalibur, a medieval-themed casino on the Strip. She had come from Illinois to start a new life, said Vondran, her uncle. Edward Brandt was a former boyfriend from home, he said.
About 8:30 p.m., Brandt, 31, walked into the casino. Not far from the entrance, he fired several shots from a handgun. Patrons fled in terror.
Brandt committed suicide at the scene. An hour later, Kenny was pronounced dead at University Medical Center from wounds to her chest and head.
"Everyone who ever met her loved her and immediately recognized what a wonderful person she was," said Vondran. "It's beyond terrible. She meant so much to us, and this crazy bastard came and took her away."
At the White House on Dec. 19, President Barack Obama referred to the killings of Lang, the Memphis officer, and Kenny, though neither by name.