Kaupp v. Texas

This case turns on the Fourth Amendment rule that a confession “obtained by exploitation of an illegal arrest” may not be used against a criminal defendant. Brown v. Illinois, 422 U. S. 590, 603 (1975). After a 14-year-old girl disappeared in January 1999, the Harris County Sheriff’s Department learned she had had a sexual relationship with her 19-year-old half brother, who had been in the company of petitioner Robert Kaupp, then 17 years old, on the day of the girl’s disappearance. On January 26th, deputy sheriffs questioned the brother and Kaupp at headquarters; Kaupp was cooperative and…