NEW YORK (AP) — Worshippers, clergy and choir members will wear hoodies to a Manhattan church service on Sunday in honor of  Trayvon Martin.

The service at Middle Collegiate Church also will include a song composed in his memory.

The sermon will urge congregants to sign online petitions, and to post online photos of themselves and their friends wearing hoodies.

Martin was wearing a hooded sweat shirt, called a hoodie when he was killed by a a neighborhood watch captain, who has not been charged. He has said he fired in self-defense.

On Wednesday, hundreds of people participated in a Manhattan march in the teenager's memory.