It was over when ...
Bears rookie wide receiver Johnny Knox broke the 21-21 tie after halftime, taking the kickoff 102 yards for the first return touchdown of his career. The speedy Knox also had five receptions for 31 yards.
The Lions couldn't get anything going in the second half. After scoring three touchdowns in six drives of the first half, Detroit had minus-8 yards in the third quarter and then could only muster a field goal in three fourth-quarter possessions.
Lions QB Matthew Stafford limped off the field after he was sacked in the fourth quarter. Stafford twisted his knee on the play. ... Devin Hester, Chicago's top wideout, left the game in the second quarter with a shoulder injury. He did not return. ... There was a helmet communication problem for Stafford that caused him to run to the sideline after the first eight plays of their first drive of the fourth quarter. He eventually took backup QB Daunte Culpepper's helmet for the rest of the drive. ... Culpepper entered the game for Detroit's final two possessions. ... The Lions have lost 14 straight road games. ... Bears coach Lovie Smith is 7-4 vs. the Lions.