California's attorney general says a nearly yearlong investigation shows that Sacramento police believed they were in danger when they fatally shot an unarmed black man who refused commands and moved toward officers with something in his hand.

When police officers parked a man's car outside their own station to keep it safe, no-one expected their colleagues to then mistakenly blow it up. But sometimes, despite the best of intentions, our defenders of law and order get it wrong. BBC News takes a look at some other unfortunate blunders. Last week, kind-hearted police officers helped a man who had fallen ill and took him to hospital in Cumbria. Unfortunately, having parked his car outside Workington police station for safe keeping, they failed to make what they had done sufficiently clear to their colleagues.

San Diego police arrested 35 people Friday during protests that followed Donald Trump's rally here, drawing praise from the presidential candidate on Twitter. "Fantastic job on handling the thugs who tried to disrupt our very peaceful and well attended rally. At least 18 people received medical attention. San Diego police reported no property damage during the protests, which drew an estimated 1,000 people. In the Gaslamp Quarter, police declared an unlawful assembly because of violence about 4:40 p.m., announcing in Spanish and English that crowds needed to disperse.

San Diego police arrested 35 people Friday during protests that followed Donald Trump's rally here, drawing praise from the presidential candidate on Twitter. "Fantastic job on handling the thugs who tried to disrupt our very peaceful and well attended rally. At least 18 people received medical attention. San Diego police reported no property damage during the protests, which drew an estimated 1,000 people. In the Gaslamp Quarter, police declared an unlawful assembly because of violence about 4:40 p.m., announcing in Spanish and English that crowds needed to disperse.

The police obtained an arrest warrant for the man, Fumio Miyazaki, whose address and occupation are unknown, on Friday and later put him on the nationwide list. The police also released a profile photo of the suspect. Miyazaki allegedly stopped a car driven by a 24-year-old man by recklessly driving his own car near the Moriya rest area on the inbound lanes of the Joban Expressway in Moriya, Ibaraki Prefecture, at around 6:15 a.m. on Aug. 9, according to the police. After getting out of his car, Miyazaki is suspected of punching the man several times, shouting things like "I'll kill you!" The man submitted a victim report to police last Sunday.