Mobile phone footage shows the moment teenager Coral Millerchip began kicking and hitting an 80-year-old man in Coventry city centre.
The video shows the man try to defend himself against the attack, but she kicks him and pushes him to the floor as friends cheer her on.
The man later died in hospital.
Millerchip, aged 19, was today jailed for a total of 44 months.
More top news
Today will be another dry and warm day with some good spells of sunshine.
ITV News can reveal the number of potential buyers for Tata's steel business in the UK is more than double the previously known total.
A 37-year-old man has appeared in court charged with murdering a teenager who was shot as he sat in a car in Ladywood.