FERGUSON, Mo.--Police on Friday named the officer involved in last Saturday's fatal shooting of Michael Brown and released new documents allegedly tying Mr. Brown to a robbery of a convenience store shortly before the shooting.

Ferguson, Mo., Police Chief Thomas Jackson on Friday releases the name of the the officer accused of fatally shooting an unarmed black teenager. Jeff Roberson/Associated Press
 
At a brief news conference, Ferguson Police Chief Thomas Jackson said the officer involved in the shooting is Darren Wilson, who has been an officer on the force for six years and has no record of disciplinary actions.

Mr. Jackson also released a police report and photos pulled from a surveillance video, taken before the shooting, of a robbery allegedly involving Mr. Brown, an unarmed 18-year-old whose death has sparked nights of unrest and protests around the U.S.

The report details what officers called a strong-arm robbery with police and eyewitnesses describing someone alleged to be Mr. Brown pushing a store clerk at one point before leaving the convenience store with a handful of cigars. The report goes on to say Mr. Brown was shot by police shortly after the incident.
Mr. Jackson declined to take questions after releasing the new details that were made public as part of a freedom of information request filed with police. The lawyer for Mr. Brown's family did not immediately respond to a request for comment.

A fifth night of protests passed without violence in Ferguson, Mo. Thursday, after SWAT teams stepped down and the highway patrol took over security of the area.

More on Ferguson Unrest

Frustration is building among protesters in Ferguson, Mo., over tactics the police are using to calm citizens. John Jay College of Criminal Justice professor Robert McCrie discusses police tactics on the News Hub with Sara Murray. 

The new information comes after several nights of clashes between protesters and police gave way Thursday evening to general calm as police changed their tactics. .The shooting also raised racial tensions in a city that is two-thirds African-American while a majority of the police force is white. Mr. Brown is African American. Mr. Wilson has been described by witnesses in local media as being white, according to the Associated Press.

Gov. Jay Nixon on Thursday ordered that Capt. Ron Johnson of the state highway patrol assume command of the protest response, with marching orders to shift the tone from the militaristic posture of days earlier.
"Lately it has looked a little more like a war zone—and that's unacceptable," Mr. Nixon said of the St. Louis suburb of about 21,000 residents.

With Capt. Johnson leading the way, protesters marched up one of the main streets of Ferguson Thursday evening. The officer stopped and answered questions from people standing on the side of the road.
Mr. Johnson told protesters early on that there would be no tear gas, and police also abandoned riot gear and heavy trucks that had marked their response on earlier evenings.

At one point Mr. Johnson, who is African American, stopped to talk with protesters who offered the sweating captain a bottle of water, who accepted it with a smile.

Once the captain left, crowds gathered with signs and chanting, but no police vehicles or helmeted officers patrolled the area. Traffic moved freely throughout the evening down the same streets that just the night before resembled an occupied war zone. Volunteers from the community kept traffic moving and wouldn't put up with anyone stopping traffic.

President Obama called for calm after the death of an unarmed black teenager as protests continued in Ferguson, Mo. WSJ's Ben Kesling reports from Ferguson on the News Hub with Sara Murray.
The scene was almost festive, with people celebrating and honking horns. Young men piled on top of cars, a dozen or more hanging off some sedans, cheering and waving as the overloaded vehicles drove the streets.
But moments of tension persisted in a town still reeling from the shooting death of Mr. Brown. County police are investigating and have offered an account of the shooting that conflicts sharply with one provided by an attorney for a young man who allegedly was with Mr. Brown at the time. Federal officials are conducting their own investigation into whether Mr. Brown's civil rights were violated.

At one point, a flatbed tow truck stopped in traffic and young men jumped on the bed, cheering to the crowds. The tow truck driver, a white man with a cigarette dangling from his mouth and concern in his eyes, was helped by local community members who told the young men to get down, which they did quickly.
Later, police cruisers arrived at the McDonald's parking lot, but soon turned around and sped back off after tensions rose with protesters, some of whom threw bottles at the vehicles and cursed at the officers. Some in the crowd cheered the small victory against the police while others lamented the fact that anyone would try to incite violence with the police after relations showed signs of repair.

Write to Mark Peters at mark.peters@wsj.com and Ben Kesling at benjamin.kesling@wsj.com
Missouri Governor Jay Nixon speaks about the unrest in the town of Ferguson following the shooting death of Michael Brown during a forum for residents and faith and community leaders held at Christ the King UCC Church. Getty Images