Panchbudhe had allegedly abused Rajendra Gajbhiye, who is also younger brother of Siddharth, a key witness in the Dalits' killings.
The incident took place on January 15 and a formal complaint was lodged by Gajbhiye with Andhalgaon police station in the neighbouring Bhandara district, on Saturday.
Siddhartah and Rajendra are the relatives of Bhaiyalal Bhotmange, the lone survivor of Khairlanji killings. His wife Surekha and children Priyanka, Roshan and Sudhir were brutally killed in last week of September 2006.
The Dalit killings triggered violent protests across Maharashtra in December 2006.