"Is our democracy going to become a banana republic? Can they kill a person? Then why is there law or court or police?" Owaisi questioned.
A 50-year-old man was beaten to death and his son seriously injured by a mob which barged into their house in Dadri, UP on Monday night following rumours that the family had consumed beef.
Cow slaughter is banned in Uttar Pradesh.
He alleged that the "Sangh Parivar" is trying to convert India into a "Hindu Nation".
"A person whose son works with Air Force has been killed. What message is being sent out to the people through such acts?" Owaisi asked.