From the Associated Press :

On April 25, Gregory Despres arrived at the U.S.-Canadian border crossing at Calais, Maine, carrying a homemade sword, a hatchet, a knife, brass knuckles and a chain saw stained with what appeared to be blood. U.S. customs agents confiscated the weapons and fingerprinted Despres. Then they let him into the United States.

The following day, a gruesome scene was discovered in Despres’ hometown of Minto, New Brunswick: The decapitated body of a 74-year-old country musician named Frederick Fulton was found on Fulton’s kitchen floor. His head was in a pillowcase under a kitchen table. His common-law wife was discovered stabbed to death in a bedroom.

Bill Anthony, a spokesman for U.S. Customs and Border Protection, said the Canada-born Despres (above) could not be detained because he is a naturalized U.S. citizen and was not wanted on any criminal charges on the day in question.

Anthony said Despres was questioned for two hours before he was released. During that time, he said, customs agents employed “every conceivable method” to check for warrants or see if Despres had broken any laws in trying to re-enter the country.

“Nobody asked us to detain him,” Anthony said. “Being bizarre is not a reason to keep somebody out of this country or lock them up. … We are governed by laws and regulations, and he did not violate any regulations.”

Anthony conceded it “sounds stupid” that a man wielding what appeared to be a bloody chain saw could not be detained. But he added: “Our people don’t have a crime lab up there. They can’t look at a chain saw and decide if it’s blood or rust or red paint.