Transcript for Rallies Spread Nationwide in Support of Trayvon Martin
We begin with the protests across the country tonight. More than 100 rallies, justice for trayvon they're being called, and they come just 24 hours after some very personal reflections from president obama. Saying trayvon martin could have been him. Here in new york, trayvon martin's brother and mother at a rally led by the reverend al sharpton in downtown manhattan. In miami, a mother with her arms around her 12-year-old son. At a rally there. In the west tonight, in las vegas, a father and his young son there and the american flag. It was one week ago tonight that not guilty for george zimmerman and protesters are now demanding a civil rights case, among their many questions, why was trayvon martin followed in the first place? Here's abc's gio benitez. I am -- trayvon martin! Trayvon martin! Reporter: Trayvon martin, alive in the hearts of protestors who want self-defense laws redefined after george zimmerman's acquittal. Here you are with this sign. "Justice for all the trayvons." What do you mean? Well, he -- trayvon martin is not alone. There are many out there who are abused in ways, large and small, just like he has been. Reporter: Thousands in at least 100 cities, braving the broiling heat to take their message to the streets. You brought so many friends. You've brought your own son. Why? Because we believe in justice. It's not a black thing, this is a human thing. That my son could have been trayvon. He is the same age. Reporter: In new york, trayvon's mother, sybrina fulton, was side by side with music star beyonce, jay z and the activist, reverend al sharpton, who organized the rally. Of course we are hurting and of course we're shock and disappointed, but just seemeans that we have to roll up our sleeves and continue our fight. Reporter: Many here want george zimmerman to face federal civil rights charge. His attorney, mark o'hara, in a interview with abc news this afternoon. He'll never have the life he had before this event. He is somewhat frustrated that that jury verdict is not being believed. Reporter: That verdict prompted president obama late friday to make a surprise visit to the white house briefing room. Trayvon martin could have been me, 35 years ago. There are very few after can american men in this country who haven't had the experience of being followed when they were shopping in a department store. That includes me. Reporter: And tonight, the streets here are quiet. But those protesters sure want to know what that justice department investigation will find. David?
This transcript has been automatically generated and may not be 100% accurate.