KYIV (Reuters) – Ukraine is investigating almost 26,000 suspected war crime cases committed since Russia’s Feb. 24 invasion and has charged 135 people, its chief war crimes prosecutor told Reuters. Of those charged, around 15 are in Ukrainian custody and the remaining 120 remain at large, Yuriy Bilousov, head of the war crimes department of the Prosecutor General’s office ,said in an interview in the capital Kyiv. Thirteen cases have been submitted to courts and seven verdicts have been issued, he said. In May, a 21-year-old captured Russian soldier became the first person to be convicted in a…