A more thorough explanation:

inventus

When something is found, it is called inventus. This Latin word is often used in phrases like "treasure trove" (thesaurus inventus) or "he is not found" (non est inventus).

• Archaeologists were thrilled when they made an inventus of ancient artifacts.
• The police searched for hours, but the suspect was not inventus.

The first example shows how inventus is used to describe a discovery, while the second example shows how it can be used to indicate that someone is missing or has not been found.