An old e-mail of a former OceanGate employee to a colleague raising concerns regarding the safety of Titan submersible has resurfaced. "I don't want to be seen as a Tattle tale...but...I'm so worried he (OceanGate CEO Stockton Rush) kills himself and others in the quest to boost his ego," he wrote. Rush, with four others, died in the submersible's implosion.