Which of the following situations could constitute 'standing' in legal terms?

Standing in legal terms refers to the capacity of a party to bring a lawsuit or legal action, grounded in having a sufficient connection to and harm from the law or action challenged. In this context, a person whose privacy is invaded by law enforcement has standing because they have experienced a direct impact from the actions of the authorities. This invasion of privacy can constitute a harm or injury, which is a fundamental requirement for establishing standing.

A witness to a crime may present relevant information but does not have a personal stake or injury regarding the legal action that could grant them standing. Similarly, a suspect in an investigation has their own legal concerns but may not be in a position to claim standing in a lawsuit that doesn't directly involve them as the party pursuing the action. A juror in a criminal trial is involved as part of the legal process but does not possess standing to sue or challenge actions related to the trial itself, as their role is to render a verdict rather than to seek legal remedy.

Thus, the individual whose privacy has been violated by law enforcement possesses standing, given the personal and direct nature of the infringement they have suffered.