http://www.chron.com/sports/article/...er-6026128.php
"In 1993, Texas handed him a 19-month suspension.
In 2007, the New Mexico Racing Commission tossed him for the same offense. NMRC set the penalty at five years, then granted him a probationary return after four years. That year, 2011, he resumed his career at Sam Houston.
The veteran competed in more than 10,000 races. His mounts' earnings reached $26 million. In three of his best years, Chapa ranked among the nation's top 50 jockeys in riding wins"