John Dewain Bailey, 45, 708 West Main St., Newbern, was arrested on Friday morning and charged with first-degree murder.
Robertson, a single mother of two, was found murdered inside her residence on Patty Drive in Newbern on Wednesday evening from an apparent gunshot wound.
NPD investigators Lt. Rodney Wright and Lt. Greg Barr lead the investigation. Following a lead, they caught up with Bailey at his residence on West Main Street on Thursday afternoon. Wright and Barr then escorted him back to the police department for questioning, where he remained until being charged with Robertson's murder.
Wright stated they could not release the type of firearm used in the commission of the homicide, but did confirm Robertson was shot from outside of the house while she was by a window.
"However, it was not a drive-by shooting," said Wright.
Another person inside the residence, at the time of the shooting, found Robertson's body and called Newbern dispatch to report the incident.
Investigators added they do have what they believe to be the murder weapon in their possession.
Wright also said that since the investigation in ongoing he could not state exactly what Bailey's motive might have been.
"Our investigation has revealed that they did know one another and that the motive was personal in nature," said Wright. "But, at this time we just can't say what it is since the murder is still being actively investigated."
Wright noted Bailey is the former owner of Bailey's Tire and Lube that used to be located on Highway 211 North.
Newbern Police Chief Harold Dunivant stated his agency worked non-stop on the case until the suspect was charged.
"From the minute we received the 911 call, until an arrest was made, we didn't stop," said Dunivant.
Bailey is being held in the Dyer County Jail without bail. He is scheduled to appear in front of Newbern City Judge Jason Creasy on Wednesday, Sept.7.
Wright stated they are still investigating Robertson's murder and encouraged anyone with information about the victim or Bailey to contact Newbern Police at 627-2571.