Final answer:
The sketch of the bra clasp in the Amanda Knox trials showed a foreign DNA profile.
Step-by-step explanation:
In the Amanda Knox trials, the sketch of the bra clasp showed a foreign DNA profile. The bra clasp was a key piece of evidence in the case, as it was found at the crime scene and contained DNA that did not match Amanda Knox or the victim. The presence of a foreign DNA profile on the bra clasp helped support the prosecution's argument that Knox and her co-defendant were involved in the crime.