Besides practicing law, he served as vice-president of Telangana Praja Front, a regional political movement which was formed as a Telangana separatist organisation, demanding statehood for the Telangana region that was then a part of Andhra Pradesh. In recent years, he was active in anti-Uranium mining struggle in Nallamala Forest area and also participated in public protests in the aftermath of Gauri Lankesh's murder.
In 2019, Krishna was arrested along with state president of Telangana Vidyarthi Vedika (TVV), Bandari Maddilet for in actively recruiting new members and collecting funds for the outlawed Communist Party of India (Maoist). They are also accused of supporting bandh calls and various activities conducted by their respective parties in urban areas of Telangana state. However, the Telangana High Court deemed his arrest as unlawful. Finally, in 2020, National Investigation Agency filed a chargesheet against Krishna under the Telangana Public Security Act and the Unlawful Activities (Prevention) Act. The charges were related to his involvement in a criminal conspiracy aimed at recruiting youth and generating funds for the Maoist party through affiliated organizations, including Telangana Vidyarthi Vedika and Telangana Praja Front. He was later granted bail due to health issues.