Captain Yusiel Lopez Insua faces seaman's manslaughter charges after a collision in Miami killed three girls from the Miami Yacht Club.The DOJ alleges that Insua was browsing internet marketplaces on his cellphone while his tugboat pushed a heavy barge into a sailboat.The victims were children aged 7 to 13 who became trapped in the wreckage according to the US Coast Guard after the catamaran stalled.If convicted of the safety violations and neglecting to assign a lookout, the defendant could serve up to 10 years in federal prison.