▁out ▁an ▁attack . ▁This ▁new ▁framework ▁highlight s ▁the ▁complexity ▁of ▁the ▁path way ▁to ▁a ▁mass ▁shooting , ▁including ▁how ▁each ▁one ▁can ▁be ▁“ soci ally ▁cont ag ious ”, ▁but ▁also ▁creates ▁a ▁plan ▁to ▁prevent ▁the ▁next ▁shooting . ▁Each ▁one ▁of ▁the ▁four ▁them es ▁represents ▁an ▁opportunity ▁for ▁inter vention . ▁By ▁reducing ▁access ▁to ▁fire ar ms ▁( me ans ), ▁slow ing ▁cont ag ion ▁( validation ), ▁training ▁in ▁crisis ▁inter vention ▁de - es cal ation ▁( c ris is ), ▁and ▁increasing ▁access ▁to ▁afford able ▁mental ▁health care ▁( tra uma ), ▁a ▁mass ▁shooting ▁can ▁be ▁a vert ed . ▁D ens ley ▁and ▁Pet erson ' s ▁research ▁also ▁shows ▁that ▁to ▁really ▁understand ▁the ▁profiles ▁of ▁mass ▁kill ers , ▁you ▁have ▁to ▁look ▁at ▁the ▁types ▁of ▁locations ▁they ▁target ▁because ▁K - 1 2 ▁school ▁shoot ers ▁are ▁different ▁from ▁house ▁of ▁worship ▁shoot ers , ▁who ▁are ▁different ▁still ▁from ▁work place ▁shoot ers ▁and ▁so ▁on . ▁ ▁D ens ley ▁and ▁Pet erson ▁also ▁partner ed ▁with ▁the ▁Min net on ka ▁Police ▁Department ▁to ▁develop ▁a ▁new ▁mental ▁ill ness ▁crisis ▁inter vention ▁training ▁for ▁law ▁enfor cement , ▁known ▁as ▁The ▁R - Model . ▁ ▁G row ing ▁Again st ▁Vi ol ence ▁ ▁D ens ley ▁is ▁co - found er ▁of ▁G row ing ▁Again st ▁Vi ol ence , ▁a ▁London - based ▁char ity ▁that