You've seen the videos in newscasts and social feeds: Federal agents employing chokeholds, firing pepper spray at close range, and even using vehicle maneuvers to control immigration protests.

These videos have spurred debate over whether agents have violated federal policies on use of force, which is authorized "only when no reasonably effective, safe, and feasible alternative appears to exist," according to Department of Homeland Security policies.

A review of hundreds of videos, most recorded on cellphones by protesters and posted online, shows repeated instances that don't appear to meet that standard.

We asked Eric Balliet, a career federal agent who worked under both Democratic and Republican administrations for more than two decades, to review some of the tactics used in these vi

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