Martinez felt someone clip her foot , and she stumbled .
Brenda Martinez was in second , making the final turn when Alysia Montano , running in fourth at the time , approached from behind .
Brenda Martinez felt someone clip Brenda Martinez 's foot , and she stumbled .
Brenda Martinez was in second , making the final turn when Alysia Montano , running in fourth at the time , approached from behind .