What is a common example of direct evidence in a criminal case?

Eyewitness testimony serves as a compelling example of direct evidence in a criminal case because it can provide firsthand accounts of the crime as seen directly by a witness. When someone observes an event occur, their testimony can be used as direct proof that the event took place, establishing facts without the need for inference or additional reasoning. This type of evidence is pivotal in court, as it often carries significant weight in determining the outcome of a case.

In contrast, the other options represent forms of evidence that can be categorized as circumstantial or indirect. A defendant's alibi may suggest a reasonable explanation for their whereabouts but does not directly prove innocence without supporting evidence. Digital footprints can imply certain actions but require interpretation to establish context. Personal testimonies from friends may provide character insight or context but do not directly confirm or deny the occurrence of the crime itself. Thus, eyewitness testimony uniquely qualifies as direct evidence vital for establishing facts in legal proceedings.