The Orlando Sentinel is reporting that Trayvon Martin decked George Zimmerman with one punch and then repeatedly slammed his head into the sidewalk, according to a newly released version of the events that led up to the 17-year-old’s death.

The neighborhood watch captain was left “bloody and battered,” according to the version Zimmerman told investigators. Witnesses have corroborated his version, authorities told The Orlando Sentinel. And ABC News reports that Zimmerman told police that Martin knocked him down and attempted to take his gun.

Zimmerman, 28, shot Martin to death on Feb. 26 in Sanford, Fla., and the case has become a lightning rod for activists who claim the killing was racially motivated. Activists, including Al Sharpton, Jesse Jackson, and NAACP leader Ben Jealous, have addressed rallies in the Orlando suburb.

Another is planned for Monday afternoon attended by Baltimore Ravens linebacker Ray Lewis and basketball legend Patrick Ewing.

Zimmerman claimed self-defense, but his version of what occurred has been slow in coming out.

Read more on Newsmax.com: Trayvon Martin Death: Police Say Witnesses Back Zimmerman's Story