DALLAS (AP) - Police say Dallas Cowboys defensive lineman Jay Ratliff didn't seem drunk at first when they pulled him over this week.

The 31-year-old Ratliff was arrested shortly after midnight Tuesday on suspicion of driving while intoxicated. Ratliff was arrested after his pickup truck sideswiped a semitrailer truck in Grapevine, 20 miles northwest of Dallas.

A search warrant affidavit released Wednesday says Ratliff did not appear to show any signs of intoxication at first. Grapevine police Officer Eric Barch says he investigated further because nighttime wrecks often involve drunken drivers and people in good physical shape can hide signs of intoxication.

Last month, Cowboys nose tackle Josh Brent was indicted on an intoxicated manslaughter count in the Dec. 8 crash that killed his friend and Cowboys practice squad member Jerry Brown.