Lawyers for 100 survivors and relatives of victims of the deadliest shooting in Maine history have begun the formal process of suing the U.S. Army for what they say was a failure to act to stop the reservist responsible for the crime,

More than 100 family members and survivors of Maine’s worst mass shooting are planning to file a lawsuit against the U.S. Army for failing to respond to warning signs that the reservist shooter was a threat.

A group of survivors and relatives of victims said the military failed to respond to warning signs from the gunman, an Army Reserve grenade instructor, ahead of the shooting.