A man in Cape Coral, Florida on Wednesday was arrested for shooting and killing an unarmed door-to-door salesman on his property.

Kenneth Bailey Roop, 52, has been charged with second-degree murder for killing 30-year-old Nicholas Rainey.

A co-worker who witnessed the shooting said Rainey had knocked on Roop’s door, but received no answer. While Rainey was walking down the drive-way, Roop pulled up in his pickup truck and asked why Rainey was at his house. Rainey explained that he was selling steak and seafood. The witness said Roop then pulled out a black handgun and shot Rainey. As Rainey lay on the ground, Roop fired another bullet into the back of his head.

Roop later told police that he shot Rainey in the head “for effect” and that he had three no trespassing signs on his property. Roop said he feared for his life.

“I’m not going to give him the chance to do something to me,” he told police. “I was in fear.”