The family of the teenager fatally shot by a Ferguson police officer Saturday is asking for witnesses to come forward, and for an end to violence.

Michael Brown, Senior, holds a picture of Michael Brown at a press conference with Brown's mother, Lesley McSpadden and attorney Benjamin Crump (right).  (photo courtesy; Jessica Machetta)

Michael Brown, Senior, holds a picture of Michael Brown at a press conference with Brown’s mother, Lesley McSpadden and attorney Benjamin Crump (right). (photo courtesy; Jessica Machetta)

Michael Brown was on his way to his grandmother’s house when the incident with police occurred. Police say Brown struggled with police before the shooting, but witnesses say he was shot with his hands up while fleeing police.

Brown’s father, Michael Brown Senior, is asking for witnesses to cooperate, especially those with video of the incident.

The family has hired attorney Benjamin Crump, who also represented the family of Trayvon Martin, the Florida teen who was shot to death in 2012 by George Zimmerman. He says there are two different stories about Brown’s death.

“The witnesses have come forward and said it did not happen as the police said it happened and that you only got their version of what happened, and not the witnesses’ version of what happened,” says Crump. “We think it will be very clear when all this is over what really happened and how this child was executed.”

Brown Sr. says he wants justice for his son. “He was funny, silly, he’d make you laugh. Any problems that would be going on or any situation, there wasn’t anything that he couldn’t solve. He would bring people back together. He’s a good boy. He didn’t deserve none of this.”

Brown was a 2014 Normandy High School graduate and would have started classes Monday at Vatterot College. His mother, Lesley McSpadden, says the family should be happy.

“We can’t even celebrate. We’ve got to plan a funeral,” says McSpadden.

President and CEO of the NAACP, Cornell William Brooks, says the violence that has followed Brown’s shooting, “may be inexcusable,” but says, “it is not unexpected.”

“Note the young man whose rage is in your heart,” Brooks tells demonstrators. “Note that he was non-violent. He never got into a fight. If you want to honor his memory, honor his memory by seeking justice non-violently.”

The FBI is conducting an investigation that it says will “supplement, rather than supplant, the inquiry by local authorities.” The Florissant Police Department says the name of the officer that shot Brown will be released Tuesday.