A Hamilton County family has a lot of questions after their family member was killed in an officer-involved shooting.  

It took 12 hours for investigators with the Tennessee Bureau of Investigation to process the scene in East Brainerd on Broyles Drive.  Authorities said Charles Bradley Payne was shot when he pulled a knife but family members tell Channel 3 that's not the case. 

His mother lives in the home where the shooting happened and called for help. 

"My front door was shattered. Shattered. And I said, 'Oh my God, they have shot my son,'" Barbara Payne said. 

Barbara Payne recounts the moment her 42-year-old son, Charles Bradley Payne, was shot to death by a Hamilton County deputy on the porch of her Broyles Drive home. 

"I kept yelling, I kept saying, 'You shot my son. You shot my son.' And they wouldn't answer me," she added.  

She said she called 911 after getting into an argument with her son and he wouldn't leave. 

Investigators with the TBI said Payne was armed with a bat and at some point dropped it and brandished a knife which is what they said led to the deputy shooting him. 

Barbara said her son often walked with a bat at night for protection but said her son did not have a knife. 

"He did not have a knife, there was no knife. We are not sure where that's coming from or where they've concocted that," Payne's cousin Missy Smith said.  

Jamey Payne was in the hospital when he learned what happened to his brother.  He said his brother will be remembered for the love he had for his family and the outdoors.  

"He was a very nice guy. He would do anything for anybody. He was a good Dad, I mean he was a hard worker," he added. 

The deputy, who has not been named by authorities, is on leave, which is department protocol in situations like this.  The TBI will turn all evidence over to the Hamilton County District Attorney and he will determine if the shooting was justified.