In a separate trial, both Knox and Sollecito were tried for the murder, but the evidence was much less than with Guede. No witnesses testified that they had seen or heard Knox or Sollecito enter or leave the house that night. Also, the small amounts of DNA connecting them to the murder were in such low amounts that it could be considered contamination, and such small amounts of DNA are inadmissible during trials in British or U.S. criminal courts. Although numerous shoe prints had been found matching Guede's Nike shoe, there were no shoe prints matching any of the shoes which police had taken from the houses of Knox and Sollecito. The main issues about them were that they said things that seemed suspicious: