sentence1: Lib Dem justice spokesman David Howarth said the footage showed a "sickening and unprovoked attack" by police. The IPCC is investigating and said it would examine the footage. The pictures, shot at 1929 BST (1829 GMT) at Royal Exchange Passage, initially show Mr Tomlinson, who was not protesting, walking away from a group of police officers. He then receives a two-handed push from an officer, landing heavily before remonstrating with the police. Mr Tomlinson collapsed and died of a heart attack after walking to nearby Cornhill, where he received first aid from police. A New York fund manager recorded the footage, believed to be the last showing Mr Tomlinson alive.
sentence2: Mr. Tomlinson was a fund manager.