Democratic presidential candidate Hillary Clinton will deliver the keynote speech at a fundraiser for the Trayvon Martin Foundation at its annual Circle of Mothers Weekend and Conference.

The non-profit organization was founded by Sybrina Fulton, the mother of the Florida teenager who was killed in February 2012 by George Zimmerman.

Attendees of the May 20-22 conference are asked to donate a minimum of $1,500 per person in order to attend the event.

Fulton formally endorsed Clinton’s presidential candidacy last January, saying that the former secretary of state is the only candidate running who is “tough enough” to champion gun control and issues concerning the Black Lives Matter movement.

“As first lady, she advocated for the Brady Bill and convened meetings on school violence,” Fulton wrote in a statement. “As a senator, she voted to extend the assault weapons ban and against an immunity law that protects irresponsible gun makers and dealers from liability.”

“In spending some time with her in person, I also found a mother and a grandmother who truly heard me, and understood the depth of my loss,” Fulton added.

Trayvon Martin’s death sparked the progressive campaign that would become the anti-police Black Lives Matter movement. Sabrina Fulton was recently featured in Beyoncé’s sixth studio album, Lemonade, alongside mothers whose son were killed in police-involved shootings.

Mothers honoring their sons. The moments in #LEMONADE I can't stop thinking about. pic.twitter.com/zHTDaivVor — Errin (@errin_jade) April 24, 2016

Sabrina Fulton, as Breitbart news reported, has frequented Clinton campaign events, particularly in southern states where Clinton needed to shore up minority support.

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