The victim of a fatal stabbing at a luxury high-rise in Brickell over the weekend has been identified as a 17-year-old who was killed in his sleep, while the details about his killing and how the suspect later fell to his death remain shrouded in mystery. The stabbing happened on the 34th floor at the Icon Residences in Brickell, which also houses the W Hotel, Miami Police officials said. Once officers arrived, they found a victim with apparent stab wounds who was pronounced dead at the scene. D