What acronym is used for the Missing Person File search that includes checking all files in the NCIC?

The acronym used for the Missing Person File search that encompasses checking all files within the NCIC is indeed QWA, which stands for "Query With All". This search is comprehensive, allowing law enforcement and authorized agencies to access various databases to gather information regarding missing persons.

Utilizing the QWA query ensures that investigators do not overlook vital data found in other files that might provide leads or contextual information related to the disappearance. It enhances collaboration and the efficiency of investigations by allowing broader access to interconnected datasets. This thorough approach is crucial in locating missing individuals, as it brings together diverse sources of intelligence that could contribute to solving cases.