Three teenage girls have been detained for killing a "particularly vulnerable" 75-year-old man in an "unprovoked" street attack filmed on a mobile phone.Fredi Rivero was set upon in Islington, north London, on February 27 and died in hospital the next day.The victim, a Bolivian national, was near a bus stop on Seven Sisters Road when the teenagers got off a bus and surrounded him.The youths, who at the time were 14, 16 and 17, and are now 15, 17 and 17, pushed, shoved, kicked and punched him, wi

Three teenage girls have been detained for killing a "particularly vulnerable" 75-year-old man in an "unprovoked" street attack filmed on a mobile phone.Fredi Rivero was set upon in Islington, north London, on February 27 and died in hospital the next day.The victim, a Bolivian national, was near a bus stop on Seven Sisters Road when the teenagers got off a bus and surrounded him.The youths, who at the time were 14, 16 and 17, and are now 15, 17 and 17, pushed, shoved, kicked and punched him, with one of them filming the incident on her phone.