By Natalie Neysa Alund  HAYWARD -- Leo Olguin had a cocktail of
drugs in his system as he fled police and smashed his car
through a big rig, killing three teenage passengers in December
2009, testimony at his murder trial showed Tuesday.  Traces of
alcohol, cocaine, marijuana and methamphetamine were found in
Olguin's blood about an hour after the crash in downtown
Hayward, forensic toxicologist Bill Posey told jurors during the
second day of testimony in the trial.  Olguin, 25, of Hayward,
is charged with three counts of murder as well as robbery,
evading arrest and felony DUI ending in death or major injury.
Police say he had skipped out of a halfway house and was on
probation when he drove the Mazda through a red light about
12:15 a.m. on Dec. 23. As officers began chasing him, he crashed
into a Safeway big rig. The collision on A Street at Foothill
Boulevard killed three passengers -- Vanessa Hurtado, 16, Andrew
Falcon, 17, and Dominic Hall, 18.  Police said Olguin suffered
minor injuries, perhaps becaus