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What does IO stand for?

IO stands for Investigating Officer (law enforcement)

This definition appears very frequently and is found in the following Acronym Finder categories:

  • Military and Government

See other definitions of IO

Other Resources:
We have 16 other meanings of IO in our Acronym Attic

Samples in periodicals archive:

Byline: DAVID COLLINS By DAVID COLLINS LAWYERS representing the US soldier accused of slipping government secrets to WikiLeaks have called for the investigating officer to step down over bias claims.
Who assumed responsibility of Senior Investigating Officer of that investigation in the first instance?