DARTMOUTH (CBS) — A man shot by police after they say he charged at them with a knife Sunday has been charged, the Bristol County District Attorney’s office said Monday.

Ryan Kuphal, 23, of Dartmouth, was charged with domestic assault and battery, use of a motor vehicle without authority, larceny over $250, unarmed robbery of a person over 60 years old, and unarmed carjacking. The Bristol County DA’s office said the charges were preliminary, and that the investigation remains ongoing.

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Dartmouth police were called to a home on Sunday on a report of a domestic violence incident between a mother and her son. While officers were responding, the DA’s office says Kuphal fled in his mother’s car.

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When officers found Kuphal a short time later outside of a home, they say he charged at them with a knife. The officers used a stun gun, but said it didn’t work, and Kuphal continued to charge. They say one of the officers then fired a shot, hitting him.

He was taken to Rhode Island Hospital, where he was improving Monday after initially being listed in serious but stable condition.

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The Bristol County DA’s office said that, since Kuphal is currently in Rhode Island, he must first be arraigned as a fugitive from justice there and waive rendition. He will then be transported back to Massachusetts at a date to be determined, where he will be arraigned in New Bedford District Court.