blaine boudreaux , 34 , charged with intoxication manslaughter , intoxicated assault and failure to stop and render aid involving death .
accused of killing 6-year-old joshua medrano , injuring his mother , mowing down 61-year-old leonard batiste and slamming into into another vehicle .
he was stopped by police after first crash involving mother and toddler but was let go with a ticket .
batiste , a homeless man , was found dead in a ditch a day later .
one of joshua medrano 's relatives screamed at boudreaux in court : ` i hope you die ! '