He's a Mansfield tax preparer with a wife and seven children, but for a brief moment, 10 years ago on July 7, 2016, Mark Hughes was the most wanted man in America.

His story is a reminder of the chaos and outrage that followed when five Dallas law enforcement officers were shot and killed on the streets of downtown.

 It's not good memories. I can tell you that much,  said Hughes.

Ten years ago, Hughes was among dozens of demonstrators marching in a police protest through Downtown Dallas.

 I took my handgun out there, my wife out there, because previously there was a Trump rally and everyone out there had their rifles,  said Hughes.

Near the end of the march, gunshots rang out.

 I actually didn't hear the gunshots,  Hughes said.  I was in the middle of the pack and, of course, I saw the crowd take off running and, frantically, I did the same thing. 

Hughes says he surrendered his weapon to a nearby officer.

 When I gave my gun to the officer, he gave me his business card,  said Hughes.  He told me that on Monday morning, I can come up and retrieve my gun. 

Hughes said he remained in the area where five police officers were killed, unaware that he was about to become a wanted man.

 So then we stayed,  he said.  We stayed around for another hour, helping with traffic control. 

He said that's when a friend sent him a social media post from DPD with a photo of Hughes that said,  This is one of our suspects. Please help us find him. 

 And she sent me the picture,  said Hughes.  When I opened it up, I don't think I've ever been scared for my life, because I was surrounded by police officers. 

JD MILES: Do you think you could have died that night?

HUGHES: Oh, absolutely.

Hughes tried to clear things up with a nearby officer, who he says wasn't so sure he was innocent.

 He took me to command,  said Hughes.  Went to command. I told them the story and they were like, 'okay, can you go to headquarters?' 

But once at DPD headquarters, it only got worse.

 Get to headquarters. And I can't remember exactly the floor number, but I remember the floor that they pushed said 'Homicide.' And 

#cbsnews   #crimewatchdallas