"It was self defense," is what Kenneth Messemer told PIX News exclusively Tuesday morning, regarding Messemer's fatally shooting a man who police call an intruder.

When officers arrived at Messemer's home at 813 6th St. around 7:30 last night, they found 50 year old George Arndt on the kitchen floor with a gunshot wound. Medics rushed Arndt to Good Samaritan Hospital, where doctors pronounced him dead on arrival.

PIX video shows why Arndt may have picked the wrong home to enter uninvited: as part of the police investigation, officers confiscated a small arsenal of weapons from Messmer's house: at least 18 high-caliber rifles, many with high-powered scopes.

Police say that shooting victim George Arndt lived with his ex-wife in Patchogue, Long Island. She, in turn, is an acquaintance of the shooter, Kenneth Messemer. Police say Arndt drove to Messmer's house last night and broke in, then threatened to kill Messmemer. That's when Messemer opened fire on Arndt. "It was self defense, that's all I have to say," Messmer told PIX 11 reporter James Ford.

The Suffolk County Police Homicide Squad and District Attorney's Office are still investigating the case, but they have not filed any charges.