Defendant-Appellant Oscar Puluc-Gar-cia entered a conditional plea of guilty to assaulting a federal officer. He appeals the denial of his motion to suppress evidence arising from a traffic stop of the vehicle in which he was a passenger. We need not address the legality of the stop because, as the district court determined, subsequent events gave the police probable cause to arrest Puluc-Garcia.

“A person who is stopped or detained illegally is not immunized from prosecution for crimes committed during his detention period.” United States v. Garcia-Jordan, 860 F.2d 159, 160 (5th Cir. 1988). Even when a defendant has been subjected to an illegal arrest, seized evidence is admissible if its seizure was sufficiently attenuated that any taint attributable to the illegal arrest was eliminated. See Wong Sun v. United States, 371 U.S. 471, 487, 83 S.Ct. 407, 9 L.Ed.2d 441 (1963). Independent probable cause that develops after an illegal arrest is “a critical factor attenuating the taint of the initial illegal arrest.” United States v. Cherry, 794 F.2d 201, 206 (5th Cir. 1986).

After being detained by a Border Patrol officer on the basis of his illegal immigration status, Puluc-Garcia attempted to flee custody. As Puluc-Garcia and the officer struggled, the officer fell, resulting in a *568 broken shoulder blade. This altercation, which formed the basis of Puluc-Garcia’s conviction, provided probable cause for his arrest and broke the causal link with any illegality arising from the initial traffic stop. See Garcia-Jordan, 860 F.2d at 159-61 (finding that false citizenship statements made after traffic stop constituted new offense and did not warrant suppression); see also United States v. Nooks, 446 F.2d 1283, 1288 (5th Cir. 1971) (stating that illegal flight broke the nexus between the illegal arrest and the search subsequent to apprehension). Consequently, the judgment of the district court is AFFIRMED.