In many states, they already can for felonies: https://en.wikipedia.org/wiki/Citizen%27s_arrest#United_States https://en.wikipedia.org/wiki/Citizen%27s_arrest#U

In many states, they already can for felonies: https://en.wikipedia.org/wiki/Citizen%27s_arrest#United_States https://en.wikipedia.org/wiki/Citizen%27s_arrest#United_Stat... What they lack is qualified immunity, so it's pretty rare because the risk of being wrong is too great. Which seems to be a valuable take away.