The Mayor of Kansas City joined high school students walking out on April 18 in support of their classmate Ralph Yarl, who was shot in the head when he mistakenly rang the doorbell of the wrong house last week.Around 1,500 students along with teachers and staff joined what they called the “unity walk” to show their support for Yarl, local news reported, citing a school official.Video shows Mayor Quinton Lucas alongside the Staley High School Black Student Union “and the entire student body, who marched in unity … to support their classmate Ralph Yarl,” he said on Twitter. “Our young people will change this world for the better.”Yarl, age 16, was shot last week when he accidentally rang the doorbell of the wrong house while trying to pick up his siblings, local news reported. Yarl was back at home and recovering from the gunshot injuries on Tuesday, TV station KSHB said.Suspect Andrew Lester, age 84, was in custody, the Kansas City Police Department confirmed on Tuesday. Credit: @QuintonLucasKC via Storyful