The Advocate says McKesson was filming live video of the protest and walking alongside Airline Highway when he was arrested. We want them to voice their opinions.
On Tuesday, Sterling, 37, was near a convenience store where he regularly sold CDs and DVDs.
Quinyetta McMillon told The Associated Press on Friday: "I do not believe in my heart that there was a gun".
The camera then pans up to two officers confronting a man in a red shirt, which Jordan says is Sterling.
In St. Paul, about 50 protesters were arrested. Last week, Castile was driving a vehicle and was with his girlfriend, Diamond Reynolds, when they were pulled over for a broken taillight.
A video of the incident, which was posted to social media, has sparked national attention. She said people can look into her eyes, at that point 48 hours without sleep, and know that she's not going away until justice is served.
Mr Obama said Americans of "all races, all backgrounds", including many of those who were protesting, were outraged by the Dallas killings.
Hundreds of people have marched in New York City to protest police shootings in Louisiana and Minnesota.
Demonstrations have unfolded in cities including Washington, D.C., Atlanta, Miami and Fort Lauderdale, Florida.
A Louisiana State Police official told a reporter with The Advocate that the protesters were "clearly blocking the roadway".
Protesters in Fort Lauderdale on Saturday chanted "No justice, no peace" and "Hands up, don't shoot".
San Francisco, California: Several roads and ramps to get on and off the Bay Bridge were blocked by demonstrators, who kicked off their march from the city's Hall of Justice.
In St. Paul, however, scuffles broke out between protesters and police on Interstate 94.
Police said some protesters sat down after being warned they were subject to arrest if they didn't disassemble.
Two weapons were confiscated, according to a police spokesman.
Another officer had been hit in the head with a rock, though it is unclear the extent of the injuries.
Philando Castile's mother and two of his uncles are condemning a shooting in Dallas that left five police officers dead and wounded several more.
After hours of clashes, things appeared calmer and a cleanup began.
We have to come to terms with law enforcement in this country that is unwilling to come to terms with the mental state of the officers it releases on the streets daily.
Chief Michael Ciminelli says there were no injuries or property damage during the Friday night march. They were met by Georgia State Troopers and Atlanta police near the downtown connector.
Large crowds of people marched through busy streets in the central part of the city as drivers honked their horns and passers-by pumped their fists.
Their killer was an Afghanistan war veteran, 25-year-old Micah Xavier Johnson from the Dallas suburb of Mesquite, Texas.
"This was a mobile shooter who had written manifestos on how to shoot and move, shoot and move, and that's what he did", Dallas Mayor Mike Rawlings said.
Videos surfaced of two black men being shot and killed by police in back-to-back days this week.
"As far as his criminal record, it has nothing to do with right now". It marked the deadliest day for USA law enforcement since the September 11, 2001, terrorist attacks.
Three other shootings, in Tennessee, Missouri and Georgia, have endangered police during rallies.
The ACLU long has fought to end police violence, to promote equal and respectful treatment for all, and to protect the right to protest.
"To assign the actions of one person to an entire movement is risky and irresponsible. We just have to have confidence that we can build on those better angels of our nature".