Police this morning released the first details of a Saturday night murder in Allapattah -- including a sketch of the prime suspect in the killing.Around 11:45 p.m. on Saturday, someone shot a man named Hector Belgrade near 2261 NW 28th St. and then ran off, says Det. Juan D'Elia of the Miami Police Department. Belgrade had no criminal criminal convictions before his murder, based on Riptide's search of public records.Police believe the shooter was the man pictured in this sketch.Know where to fi