ANKARA, Turkey (AP) — A video showing an aide to Turkey’s prime minister kicking a protester held on the ground by special forces police sparked outrage Thursday, tarnishing the Turkish leader’s image ahead of his expected run for president.

Turkish newspapers also published photographs showing the adviser kicking the protester and identified him as Yusuf Yerkel, a deputy chief of staff at Prime Minister Recep Tayyip Erdogan’s office and adviser to the prime minister.