The man arrested in the killing of a federal agent outside a busy South Florida post office has checked into a hospital for personal medical reasons, police said Thursday.

Police Sgt. Bryan Davis said Thursday that 65-year-old James Patrick Wonder was hospitalized after being questioned by police, but could not release further information about Wonder's condition or why he was hospitalized. Authorities say he was at a dialysis center when he was caught.

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Wonder is charged with first-degree murder. He's accused of fatally shooting 52-year-old customs agent Donald Pettit Tuesday morning in Pembroke Pines after some sort of argument. Pettit's 12-year-old daughter witnessed the shooting.

Police say her detailed description of the shooter and an anonymous tip led to the suspect's arrest.

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