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MIAMI (CBSMiami) – Two mothers, both longing to hold their sons again, instead held one another at the culmination of a community march designed to find answers that might lead to the people who killed their children.

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Liz Ruffin and Tranell Harris embraced through tears, briefly united in their heartbreak.

Ruffin’s son, 10-year-old Marlon “Merv” Eason, was shot in the head outside his home on Northwest 4th Court Tuesday.

Hours earlier, just a few blocks away, Harris’ 16-year-old, Richard Hallman, was shot and killed.

So far, no arrests have been made.

“Stop the violence with these guns,” Harris said Thursday. “These are babies that they’re killing that don’t deserve their life to be taken, so senseless. I just want everybody to change.”

Watch Lauren Pastrana’s Report

Harris walked around her community Thursday alongside officers, relatives and neighbors.

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Miami Police Chief Rodolfo Llanes handed out flyers requesting the public’s help.

“We need to put the pieces of the puzzle together,” he said. “A 10-year-old has lost his life to senseless violence, and if that doesn’t touch the heart of everybody who is listening to my voice, then you have a problem.”

Miami-Dade Schools Superintendent Alberto Carvalho also went door to door to help spread the word.

“I made a promise when I became superintendent I would attend the viewing or funerals of children lost in this community and I stopped counting at 45, and that was two years ago,” Carvalho said.

Back outside the home where little Merv was killed, a somber prayer morphed into an impassioned rally to stop the violence.

“Nothing will change if we don’t say anything. We as men and woman and children have to come together,” Erick Walker shouted. “Men need to pull their pants and put their guns down.”

Another woman exclaimed, “We get mad about the police killing our kids, but we doing the same thing, it don’t make no sense. Put these guns down!”

There’s a $3,000 reward for information leading to an arrest.

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Anyone with information can call Crime Stoppers anonymously at 305-471-TIPS (3477).

Lauren Pastrana