Former NFL player's Buster Barnett's mistress killed herself on Thursday after she kidnapped and also ended the life of the ex-football player's wife in Georgia.

An initial TMZ report noted that Lisa Brown, Barnett's mistress killed the former Buffalo Bills' wife Sandra during a high-speed car chase.

Authorities revealed that Brown kidnapped the victim then sped off in a Dodge Durango on Wednesday which was spotted by the police a day after. The vehicle was chased by the police along Interstate 20 prompting Brown to shoot Barnett's wife then herself.

In a similar 11Alive report, Clayton County Police Capt. Richard Gandee said the victim was on the phone with a friend when Brown showed up at her doorstep.

"Lisa Brown was actually driving a vehicle owned by Buster," added Gandee.

Barnett's neighbors said they were suspicious of Brown's Durango outside Barnett's home. The latter had reportedly replaced the locks at her home because she believed someone tampered with it.

"We've uncovered a set of handcuffs and some receipts. [Brown] had purchased the handcuffs prior to this kidnapping," added Gandee noting that the killer planned the kidnapping.

Buster, who was part of the NFL's Buffalo Bills from 1981 through 1984, is known to have an affair with Brown for several years already.

TMZ noted that the mistress even went to the former NFL player's workplace prior to the kidnapping and told him that she felt bad because he will be going on a vacation with his wife.

Incidentally, this was not the first time that Brown broke the law for a similar offense even though Barnett claimed that he did not know his mistress was homicidal.

"Lisa Brown was actually on probation for kidnapping out of the state of Texas. She had kidnapped her child that she had lost custody of, and the jurisdiction down there had to track her for like three days to find her," Gandee added.

Just like the female Barnett, Brown was reportedly a teacher at the North Atlanta High School from 2008 to 2013 but had to leave her job after that period.

Meanwhile, Brown was loved by her co-workers at the McNair Middle School where she worked for more than two decades, as per Heavy.

"Everybody just remembers this bubbly, happy spirit -- just happy. Every day at work, you could just count on her," said co-worker Nimet Muhammad in the Heavy report.

Barnett has been cleared of any liability on the incident with investigators saying he was at work at the time of the incident.