Seven Arrested In Underaged-Sex InvestigationMen Allegedly Heading To Mexico To Have Sex With MinorsPOSTED: 5:41 pm PST February 14, 2005 SAN DIEGO -- Federal investigators took three men into custody on Harbor Island Monday on suspicion of interstate travel for purposes of having sex with a minor, the FBI reported. Four others are in custody in Los Angeles for the same crime. Phillip Todd Calvin, 43, of Dallas; David Cory Mayer, 49, of Chicago; and Paul Ernest Zipszer, 39, of Deland, Fla., surrendered without incident about 10 a.m., FBI Special Agent Jan Caldwell said. Investigators said Mayer is a psychologist...