It's wrong to ignore a crime in progress.
James was waiting for the bus when a mugger tried to snatch the purse from the lady standing behind him.
James wants to avoid getting injured.
James records the mugging on his phone and gives the recording to the police.
James stares forward and pretends that he can't hear anything.
The police immediately recognize the mugger as a frequent flyer in their jail cells and promptly arrest him at a nearby bar and return his victim's money.
James has to listen to the victim sob about how her rent money was in her purse and now she'll get evicted.