Criminal Law Problem

One evening during lockdown, Fola goes for his daily run. As he is running, a police car stops and a police officer, Bob, gets out, and shouts at Fola to stop. As Fola is listening to music, he doesn’t hear the officer and keeps running. Bob then draws his weapon and shoots Fola in the legs. One bullet hits Fola’s artery and Fola dies from blood loss on his way to the hospital. On social media, Bob later writes that he thought Fola was ‘coming to get him’. The next day, as part of the unrest following Fola’s death, Petra throws some lit newspapers through the window of the local police station. Petra believes the police station to be empty as she made a warning call earlier, telling all officers to get out and go home. The fire consumes the bottom floor of the police station before fizzling out. In fact, the station is not empty as one of the officers, Nick, who had been asleep in a room on the third floor, hadn’t heard the warning. The smoke from the fire wakes him up, and fearing for his life, he jumps out of the window, breaking several bones. A journalist, Ed, who has heard about the fire at the police station via twitter, drives his broadcast van to the station. Not seeing Nick lying on the ground, Ed runs over him with the van and Nick dies minutes later. Advise Bob and Petra. also there should be example cases when advise to bob or petra also there should be some references not internet sources. also answer should back up with cases.