A jury acquitted accused Trump inauguration rioter Casey Webber on all charges Monday, dealing another blow to federal prosecutors struggling to convict participants of a window-smashing anti-capitalism march.

Webber was accused of knowing about plans for mayhem before joining the march on Jan. 20, 2017, but prosecutors offered no evidence that he personally destroyed property. The chaotic march ended in heavy use of pepper spray and batons by police, who mass-arrested more than 230 people.