It ' s possible that she was hurt by the police either intentionally or accidentally , or by her own actions with a propane tank . It ' s too early to tell given the pictures of the burned propane tanks and without knowing whether the shrapnel they found in her wounds was metal or rubber . If it ' s metal , it ' s pretty likely she was injured attempting to commit domestic terrorism . If it ' s rubber , the circumstances and how it was used matter significantly . If she went over to throw it back at police and got her arm blown off , that ' s on her . If they threw it under the car with her , that ' s on them , as stingers can be very dangerous in confined spaces . There are a myriad of other circumstances , and it ' s all just speculation without knowing what kind of device actually hurt her . What ' s highly unlikely is that the specific piece of equipment mentioned in the article was what actually did it . Concussion grenades only very rarely leave any kind of shrapnel and they are more likely to simply kill you than make those kinds of injuries . To anyone who actually knows what a concussion grenade is , this story implies that the police are utilizing serious military equipment that it ' s unlikely they even possess which they ' ve said they don ' t in a situation where even giving it to officers would be pretty irresponsible . EDIT A letter .