Newly-released text messages reveal the extent to which Maine cops were warned about mass shooter Robert Card by his fellow servicemembers in the Army Reserves, who reported their fears six weeks before the attack that killed 18 people. 

In September, Army Reservists were so concerned that Card, 40, was about to kill that they told each other to 'change the passcode' to the entrance gate of their base in Saco, and warned each other to be armed in his presence. 

'Change the passcode to the unit gate and be armed if Sergeant First Class Card does arrive. Please. I believe he's messed up in the head.