A few weeks ago, on a Saturday afternoon, in the main town centre pedestrianised zone some young men assualted an old man, he was probably homeless with mental issues.
My 16 year old son had just walked past this old man, who standing in the street muttering some random words, when a group passed him walking in the oppsite directtion. He heard one of them say to the others to watch what he was about to do the the old man. My son looked back to see the old guy get punched to the floor and kicked several times, before the group walked off laughing.
The part which shocked me was no one stopped to help, once it was safe do so my son walked over to check and asked people passing to call an ambulance, while he put the guy in a recovery position. Not a single person stopped to help. He called the the emergency services, waited until they arrived and got out of there before the group circled back, didn't want to risk being identified as a potential witness.