Police sources Friday revealed the identity of the sergeant involved in shooting a man who he says attempted to rob him in East New York.

Sources tell News 12 Sgt. Ritchard Blake shot 21-year-old Thayvone Santana Thursday morning during an attempted robbery.

Blake has since been stripped of his gun and badge and placed on modified duty.

Police sources say Blake was already on probation for a domestic incident and the shooting may have had more to do with an ongoing dispute between Santana's family and Blake's girlfriend.

Santana's mother told News 12 her family had an ongoing dispute with Blake’s girlfriend recently.

Sources say Blake was off-duty and initially told police he shot Santana because the 21-year-old threatened to kill him during an attempted robbery.

Police say they are reviewing surveillance video from nearby cameras.

However, sources say they have seen the video of the incident and Sgt. Blake can be seen placing what appears to be a blade down on the ground near Santana after the shooting and quickly picking it up. 

In a statement the District Attorney's office wrote, "Our office responded to the scene shortly after the shooting Thursday and we are conducting an independent and thorough investigation. We will follow the facts and evidence where they lead us.”