Students gathered at the Bell Tower on Thursday afternoon to protest the killing of Florida high school student Trayvon Martin.

Students, some wearing hoods, shouted, “I am Trayvon Martin. Do I look suspicious?” as they circled the Bell Tower in march.

Martin, an African American, was shot and killed after a scuffle in Sanford, Fla. on Feb. 26. George Zimmerman, 28, a self-appointed watchman of the community north of Orlando, was found with a handgun, standing over Martin’s dead body.

The scuffle began after Zimmerman saw Martin, who was wearing his hood up and walking home from a convenience store, and placed a 911 call, claiming that the 17-year-old Martin “looked suspicious.”

Martin was found with no weapons or drugs on him, only a pack of Skittles and a bottle of iced tea.

Zimmerman has not been arrested in connection with Martin’s death.