Acording to ABC News, Swiss police have arrested a self-styled acupuncturist who was intentionally infecting people with HIV.

Police spokesman Michael Fichter says a SWAT team stormed the man’s home in the capital Bern Friday after a daylong standoff during which he had threatened officers with a samurai sword and a gun.

After his arrest the man was taken to a hospital for a medical examination.

Prosecutors accuse the man of using various pretexts to prick his victims with a needle and infect them with HIV between 2001 and 2005. They have asked judges to sentence him to 15 years in prison.