Police in Texas have charged a man with the murder of six children and two adults. br br David Conley is accused of killing the victims, who ranged from six to fifty in age, at a house in north Houston during an incident that started late on Saturday night. br br Conley was persuaded to surrender by negotiators before being arrested. br br A police spokesman described the killings as a “senseless tragedy”.br br Two of the victims were female and six were male.