The Kahugpungan sa Lumadnong Organisasyon-Caraga (Kasalo-Caraga), a progressive group in Caraga, said, on Wednesday, that the Lumad tribal leader who appeared in a video interview by Communications Assistant Secretary Mocha Uson to discuss the spate of killings in Mindanao was implicated in the deaths of Lumad leaders in Lianga, Surigao del Sur province back in 2015.