A man got killed with a single punch after telling someone it's dangerous to ride the bike on the pavement. I don't know what exactly was said throughout the conversation, but that's not even relevant in my opinion. I think the offender should have received a bigger punishment than 4.5 years in prison.
Source: http://metro.co.uk/2014/02/25/cctv-footage-released-of-moment-asperger-sufferer-was-killed-with-a-single-punch-4320000/ (video)
Source: http://metro.co.uk/2014/02/25/cctv-footage-released-of-moment-asperger-sufferer-was-killed-with-a-single-punch-4320000/ (video)