BALTIMORE (AP) — A man charged with killing a 13-year-old in Baltimore had been on the run from police for two weeks after walking away from a secure hospital unit for patients with psychological conditions.

The Baltimore Sun reports that police had taken 25-year-old Anthony Jerome Clark Jr. to a secure University of Maryland Medical Center psychological unit on May 27 after he cut his own wrist with a box cutter when tried arresting him for a robbery.

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Police said they told hospital staff to notify them before releasing Clark, but never were. A police spokesman said officers immediately began looking for Clark when they realized he was gone.

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Police say Clark shot and killed 13-year-old DiAndre Barnes on June 11.

A hospital spokeswoman said patient privacy laws prevent her from discussing the details of the matter.

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