nonrioter

noun

1. One who is not a rioter.

   “While the average age of the rioter was 27.8 years, the mean age of the nonrioter was 38.1. […] When questioned about the extent of 23 problems in the black community -- ranging from unemployment and poverty to poor schools and dirty neighborhoods -- the perceptions of riot participants varied dramatically from those of nonrioters in only three areas.”