LONDON  - British police are investigating the death of a young film maker who was sleeping rough while making a documentary about the homeless, they said. the body of Lee Halpin, 26, was found in a building in Newcastle on Wednesday just three days after he began the project. Police said they had arrested two men, aged 26 and 30, in connection with his death on suspicion of supplying a controlled drug. Both were later bailed. A post mortem into the cause of his death is due to be carried out on Tuesday. The night before he began sleeping rough,  Halpin said he wanted to “interact with as many homeless people as possible and immerse myself in that lifestyle as deeply as I can.”