Although a man had a collection of weapons, some apparently stained with blood, U.S. Customs officials said they had to allow him to come into America. He was arrested two days later in Massachusetts after Canadian officials found his neighbors dead.

Gregory Despres, a 22-year-old native of Minto, New Brunswick, arrived at the U.S.-Canadian border in Calais, ME, in April, carrying a homemade sword, a hatchet, a knife, brass knuckles and a chainsaw stained with blood.

Amazingly, the collection of weapons was not enough for U.S. customs officials to hold him at the border. Instead, they confiscated his weapons, fingerprinted him, questioned him and let him go.

According to The Associated Press, the next day authorities discovered the decapitated body of Fredrick Fulton, Despres’ next-door neighbor, along with the body of Fulton’s common-law wife, who had been stabbed to death.

Apparently, Despres had a history of violence and had been involved in an ongoing dispute with his neighbors.

Though Despres was eventually arrested two days later wandering down a highway in Massachusetts, the incident has many wondering just how the border agents could have let him cross over in the first place.

Bill Anthony, a spokesman for U.S. Customs and Border Protection, told The Associated Press that Despres could not be detained because he is a naturalized U.S. citizen and was not wanted for any crimes on the day in question.

Despres was questioned and checked for warrants for two hours before he was released, but Anthony said Customs eventually had to let him go because “he did not violate any regulations.”

“Nobody asked us to detain him,” he said. “Being bizarre is not a reason to keep somebody out of this country or lock them up.”

Most people would probably think the bloody chainsaw would be enough of a reason, but Anthony said customs officials had no way of determining if the substance on the chainsaw was actually blood.

“Our people don’t have a crime lab up there,” he said. “They can’t look at a chainsaw and decide if it’s blood or rust or red paint.”