Dallas DA Bill Hill has been in hot water for a couple of years over a huge scandal involving the jailing of illegal Mexican immigrants for selling what authorities knew were fake drugs. There’s a grand jury trying to get to the bottom of who knew what, when, and there are lots of questions centering on whether or not the powerful Hill, a son of Dallas’ tony Highland Park neighborhood, knew that his prosecutors were putting away innocent Mexicans. So get this: last week, a day before an assistant prosecutor in Hill’s office, a young man who had recently fallen out of favor with Hill, was set to testify before the grand jury, the guy turns up dead in his own home, with slit wrists. And all of official Dallas is as silent as the grave about this very suspicious turn of events — except for my colleague Ruben Navarrette. Ruben’s column today only touches on the tip of the iceberg.