"The meek ones themselves will possess the earth, and they will indeed find their exquisite delight in the abundance of peace."-Psalms 37:11. This is a promise from the Almighty for such like ones, like your heroic loved one. But as for those who causes harm to others Isaiah 57:21 says: "There is no peace...for the wicked."
Your loved one will be resurrected to peaceful earth where righteousness and goodness is to dwell. My heart goes out to all of the families who lost a loved one on this day.