Greg “Mouse” Gerwitz is an Expert Army Ranger who served alongside Intelligence Detective Jay Halstead in the 75th Ranger Regiment.
He formerly held a job at the Intelligence Unit as a civilian tech and surveillance expert before rejoining the Army Rangers in Season 4. He is portrayed by
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The team responds to the shooting of a 5-year-old girl and they must work… read more 8.01 Fighting Ghosts
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Greg “Mouse” Gerwitz is an Expert Army Ranger who served alongside Intelligence Detective Jay Halstead in the… read more Greg “Mouse” Gertwitz
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