Maine gunman was committed to a mental hospital after 'hearing voices': spent two weeks in mental health facility

The perpetrator of a mass shooting that left at least 18 people dead has been identified as a trained firearms instructor who spent two weeks in a mental health facility over the summer. 

Maine police are hunting Robert Card, 40, in connection to the massacre in the city of Lewiston last night, which saw dozens across two locations in Maine killed or injured by the gunman's AR-15-style weapon. 

So far, 18 people have died as a result of the shooting spree. Police are still working to identify the victims of the deadliest shooting in the US this year.