Police identified the suspect as Massimo Galioto, a 40-year-old from Rome. In a statement Tuesday, police said he was taken into custody because he was "seriously implicated" in the murder.
Body found in Rome believed to be missing American student
Police on Monday pulled the body of Beau Solomon from the Tiber River. The 19-year-old student from Wisconsin had last been seen early Friday morning at a pub, shortly after arriving in Rome.
John Cabot University, an English university in the Italian capital, confirmed his death on Monday evening.
Solomon had recently completed his first year as a personal finance major at the University of Wisconsin-Madison.