updated 12/15/2010 8:57:52 PM ET 2010-12-16T01:57:52

An alleged bank robber was captured in eastern Iowa on Wednesday after escaping from custody at a hospital wearing only a gown and flip-flops and eluding authorities for hours during a crime spree that included assault and carjackings, police said.

Authorities said 20-year-old Anthony Koehlhoeffer was arrested Wednesday evening in Bettendorf, Iowa, after crashing one of several vehicles he's believed to have stolen in less than 24 hours.

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Koehlhoeffer, who had been held at the Jefferson County jail, escaped while receiving court-ordered treatment at the University of Iowa Hospital and Clinics at about 11:30 p.m. Tuesday. Police said he then assaulted a female student in a residence hall parking lot and stole her car. The student was not seriously injured.

About 5:30 a.m. Wednesday, a man believed to be Koehlhoeffer — dressed in the hospital-issued gown, flip-flops and a hooded sweat shirt — committed a second carjacking at a convenience store in Iowa City, said police spokeswoman Sgt. Denise Brotherton.

Brotherton said the stolen green Buick crashed into another vehicle, and the man believed to be Koehlhoeffer fled on foot through the snow in weather that was about 10 degrees. No one was injured.

Police said a woman reported at 9:15 a.m. that she was carjacked and the man believed to be Koehlhoeffer forced her to drive him 55 miles east to Bettendorf. The man fled on foot and left her in her vehicle, Brotherton said. She said the woman was not harmed physically and the man was not believed to be armed.

Authorities said Wednesday night that Koehlhoeffer committed another carjacking in nearby Davenport before heading back to Bettendorf, where he crashed the car and was captured.

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