Toxicology tests show that Grammy-winning Tejano singer Emilio Navaira was intoxicated when the tour bus he was driving crashed into freeway barrels in suburban Houston in March, authorities said.

The toxicology tests were released this week, and the Houston Chronicle reported on the results Thursday night on its Web site. The newspaper also reported that Navaira was arrested for driving while intoxicated in September 2000.

Navaira was driving his tour bus March 23 when it slammed into the freeway barrels, throwing him through the windshield. Doctors performed two brain surgeries and repaired an aneurysm on his right lung.

The 45-year-old singer is expected to have trouble with his memory and concentration as he recovers. But his doctors have said Navaira has been able to stand, eat, sign his name and talk with his family.

Navaira, known to his fans as Emilio, has released more than a dozen albums with his band. He won a Grammy for best Tejano album in 2003 with "Acuerdate."