Activists have occupied a US police station in Ohio demanding a meeting with top cop Dennis Evers over the killing of John Crawford.

Members of the Ohio Students Federation and justice group Freedom Side entered the station on Monday after a grand jury failed to indict Sean Williams, who fatally shot the unarmed black man in a WalMart shop.

A group of about 10 protesters pledged to stay in the station until at least today, when Beavercreek police chief Mr Evers has reportedly promised a meeting.

A grand jury ruled on September 24 that police were justified in shooting the 22-year-old.

But CCTV footage released after the hearing appeared to contradict the 911 call that prompted police to head to the store, in which Ronald Ritchie claimed a “black male” was pointing a gun at people on August 5.

In fact, Crawford picked up an unloaded ball-bearing gun from a shelf, pointing it at the ground while talking on his mobile phone, and Mr Ritchie later admitted Crawford hadn’t pointed the gun at anyone.

Another WalMart customer, Angela Williams, had a heart attack and died in the panic.

Protest organiser Malaya Davis told news site Salon that the occupiers aimed to get Mr Williams, who has fatally shot two people, sacked. 

They also hope to force changes in police training and a shift in the “relationship between law enforcement and community.”

She added: “An occupation is the way that we’re going to try to force these demands to at least be heard and be taken into consideration.”