Dismissing the plea, First Additional District and Sessions Judge K P Sudheer observed that prosecution had submitted several documentary evidence to prove the crime committed by the accused.
The court then adjourned the case for August 24.
The businessman, who was in an inebriated state, had allegedly, in a fit of rage, assaulted the guard Chandrabose and later rammed his luxury vehicle into him over delay in opening the gate of his residential complex here on January 29.
The guard succumbed to injuries on February 16.
The case had evoked widespread protests across the state.