Baraka Cosmas was attacked at his family home by a gang on Saturday . Third child attacked , murdered or kidnapped since December last year . Came as 32 men were sentenced to death for killing albino woman . Authorities have also arrested four witchdoctors in north-east of country . But campaigners fear attempts to solve problem not dealing with the 'source ' - the money which is encouraging people to maim and kill . Not on buyer of charms or potions has ever been prosecuted or named . U.N. have also warned of an escalating problem in neighbouring Malawi .
Baraka Cosmas was attacked at his family home by a gang on Saturday . Third child attacked , murdered or kidnapped since December last year . Came as four men were sentenced to death for killing albino woman . Authorities have also arrested 32 witchdoctors in north-east of country . But campaigners fear attempts to solve problem not dealing with the 'source ' - the money which is encouraging people to maim and kill . Not on buyer of charms or potions has ever been prosecuted or named . U.N. have also warned of an escalating problem in neighbouring Malawi .