Run reverse image searches with more than one engine, including cropped and flipped versions, and record the earliest copies you find.
It strongly suggests the current caption may be wrong. Investigate further and treat the image's claimed context as unverified until resolved.
Be cautious. State clearly that its origin is unverified, and avoid using unverified images of private people in connection with a crime.
Cropping, compression and edits can remove context or alter details. The least compressed version is often closest to the original file.
Usually the photographer owns the copyright. Ask permission where possible and consider fair use only with care and appropriate advice.