Tristan Anderson, the 38-year-old International Solidarity Movement (ISM) protester who was wounded in a riot at the Judea-Samaria security barrier, previously had been arrested in a violent protest in Berkeley, California.
He suffered serious wounds last week when an IDF tear gas canister hit him in the head during a riot against the barrier in a weekly protest at the Arab village of Na'alin.
Anderson is improving although he remains in critical condition.
The Oakland, California resident was arrested two years ago for erecting a makeshift camp on University of California grounds and participating in a lengthy “tree sit-in” to protest a planned cutting down of 38 trees to make room for a stadium and buildings for law and business schools.
Anderson and two others violently clashed with campus police, who caught the protestors tearing down a fence around the grove of trees. One of the police officers was hospitalized after the protestors threw a liquid that left his eyes burning.
The demonstrators were charged with assault, resisting arrest, trespassing and violating a court order after judges ruled that the university could remove the tree-sitters.
Anderson came down from the tree voluntarily but was found near the tree the day after the court ordered him to stay away from the area.