Who killed Father John Kaiser? A question the Catholic Church is still grappling with 16 years after the death of the American priest.The church says the current and previous governments have shown no interest in finding the killers of the priest. Father Kaiser's body was found at MO-RE-ND-AT in Nakuru County and to date it is believed that his active involvement in the advocating for the rights of internally displaced persons after the 1992 post election violence might have led to his death.Brygettes Ngana was at the memorial mass and filed this report.Watch more NTV Kenya videos at ntv.co.ke and nation.co.ke. Follow @ntvkenya on Twitter and like our page on Facebook: NTV Kenya.