They call him "Rico Suavé." Dressed to the nines, one man has been pulling off daring thefts from some of Los Angeles' most exclusive environs. On Oscar night, with all of Hollywood gathered together and a massive security force in town, the man walked into a hotel room at the Beverly Hills Four Seasons and pocketed $45,000 in jewelry. Police say he has been involved in similar robberies since last summer. Among his marks: a sugar mogul from Cuba, a salsa band, a Mexican soccer team, and an Israeli basketball team playing at the Staples Center.