Even after 10 years, singer's death still confounds fans. By Michael Corcoran AMERICAN-STATESMAN STAFF Thursday, March 31, 2005 CORPUS CHRISTI — Felix Madrigal recalls the solemn procession of cars after his neighbor, 23-year-old singer Selena Quintanilla-Perez, was shot and killed 10 years ago today. After the news hit with the numbing thud of disbelief, hundreds gathered outside the Quintanilla family's three-house compound in the working class Molina subdivision, lighting candles, leaving flowers and sticking messages in the chain-link fence. "Everybody was in shock. It was eerie, so quiet," Madrigal said of the day that would be known as "Black Friday"...