Proving that someone was present somewhere, such as at a specific location or event, in court typically relies on presenting evidence that establishes their presence beyond a reasonable doubt. This evidence can take various forms, depending on the circumstances of the case. Some common methods used to prove someone's presence include:

1. Witness Testimony: Testimony from eyewitnesses who saw the individual at the location in question can be compelling evidence of their presence.

2. Surveillance Footage: Video or photographic evidence captured by surveillance cameras or other recording devices at the location can provide visual proof of the individual's presence.

3. Physical Evidence: Physical evidence linking the individual to the location, such as fingerprints, DNA, or personal belongings found at the scene, can support the argument that they were present.

4. Electronic Records: Digital records, such as cell phone location data, credit card transactions, or electronic access logs, can establish a person's presence at a particular place and time.

5. Alibi Evidence: Conversely, evidence showing that the individual was elsewhere at the time in question can be used to refute claims of their presence.

In court, the prosecution or plaintiff bears the burden of proving the defendant's presence at a particular location if it is relevant to the case. The strength and reliability of the evidence presented will determine whether the court finds the proof of presence sufficient to support the claims or allegations being made.