Original sentence: Police often use "less than lethal" weapons, such as Tasers, rubber-bullets and pepper spray against the crowd;  it is believed by some that they use agent provocateurs to rile the crowd, thereby justifying the use of violence against demonstrators
Edited sentence: Police often resort to non-lethal weapons, such as Tasers, rubber-bullets and pepper spray to control the crowd;  it is believed by some that they use agent provocateurs to rile the crowd, thereby justifying the use of violence against demonstrators