Rockwell "Roc" Ingersol was a young Human man with an unkempt mustache serving on board the USS Enterprise-E in early 2387 as a forensic investigator.

A talkative individual, Ensign Ingersol tended to speak rather quickly to senior officers. (TNG novel: Collateral Damage)

His name and personality seem to be a reference to Galaxy Quest's 'Roc' Ingersol character as played by Sam Rockwell.
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