Italian authorities detained a homeless man Tuesday on suspicion of murdering an American university student from Wisconsin.
Police issued a statement identifying the suspect as Massimo Galioto, a 40-year-old from Rome. They say he was taken into custody because he was "seriously suspected of aggravated homicide."
The body of 19-year-old Beau Solomon was found in the Tiber River on Monday, three days after he went missing. Solomon was last seen leaving a pub in Rome early Friday.
Solomon had arrived in the Italian capital for an exchange program at John Cabot University, an English-language university in the central Trastevere district.
The neighborhood is near the Tiber River and popular with young people because of its many bars.
Charges of about $1,500 dollars were made on his credit card in Milan, hundreds of kilometers north of Rome, between the time of his disappearance and the time his body was found.
It was not immediately clear whether his card was used in person or remotely. Italian TV reports said investigators will check security cameras near a store for possible images of who might have used the cards.
The U.S. ambassador to Italy, John Phillips, has pledged assistance to Italian authorities investigating the death.