BOSTON (AP) — A man calling himself Clark Rockefeller, who is accused of kidnapping his 7-year-old daughter and is being investigated in a California couple's disappearance, was charged Wednesday with giving a false name to police.

Investigators say Rockefeller is really German citizen Christian Karl Gerhartsreiter, who came to the United States as a high school student in 1978 and has been living under aliases ever since.

The new charge was added during a brief appearance by Gerhartsreiter in Boston Municipal Court. He remains jailed without bail after pleading not guilty to charges of kidnapping a minor relative, assault and battery, and assault and battery with a dangerous weapon.

Police say Gerhartsreiter kidnapped his young daughter off a Boston street during a supervised visit in July. He was arrested last month in Baltimore where authorities said he fled with the daughter. The girl was found unharmed.