....a prominent gay public-relations executive days was found dead.... strangled in his own bed. Martin Barreto, 49, a former aide to then-Mayor Rudy Giuliani, was discovered naked with KY Jelly and a condom next to his body..........worked in Giuliani's press office 1994 through 1995....helped organize Hispanic support for the mayor's immigration policies...... Barreto, a distant relative of former Nicaraguan President Violeta Barros de Chamorro, lived with a cousin in the high-security building, but was alone Saturday night when he invited a stranger up. The man stayed briefly, and two hours later another visitor arrived, staying only 10 to 15 minutes....