According to Italy's ANSA news service, Bosio and fellow bridge officers were angry with Capt. Francesco Schettino for delaying the emergency signal while he talked on the phone.
Leading up to the filing of criminal charges, Bosio had been one of a dozen individuals who faced extra questioning from among the more than 200 witnesses interviewed by prosecutor Francesco Verusio. Bosio and several others were cleared, while five people received abbreviated jail sentences in plea bargains and Schettino was ordered to stand trial.
The captain is battling charges of manslaughter, shipwreck and abandoning ship in the trial that continues at Grosseto.
Thirty-two people died after Costa Concordia slammed into the rocks off Giglio island in January 2012.