Police in Georgia have released surveillance footage showing a possible suspect in last month’s unexplained murder of a 71-year-old woman.

The Atlanta Journal-Constitution reported that Sandy Springs police also increased the reward from $25,000 to $100,000—the highest in the city’s history—for information regarding the June 27 stabbing death of Kay Thomasson. Thomasson died in her home after reportedly being stabbed in the back of her neck by an unknown assailant.

Authorities believe the suspect stole Thomasson’s 2012 Kia Sorento from her home before fleeing the scene. Police recovered the vehicle June 30 at a Chamblee apartment building five miles from the victim’s home.

Springs Deputy Police Chief Keith Zgonc didn’t reveal whether the suspect forced his way into the home nor if credit cards or anything else was taken, according to the newspaper.

Though police haven’t disclosed a motive, they recently released surveillance footage taken outside Thomasson’s home which apparently shows the suspect walking by. WAGA reported that the suspect is described as a black male with a medium build.

The victim’s family continued to urge the public to come forward if any information is known.

“Our mom was such a loving member of this community for over 40 years,” Thomasson’s daughter, Katie Gryglas, tearfully pleaded during a press conference Monday, according to ABC News.

“We know this is a community that takes care of their neighbors.”

This is an ongoing investigation. Anyone with information regarding Kay Thomasson’s murder can call JT Williams with Sandy Springs Police at 770-551-6937 or Crime Stoppers of Metro Atlanta at 404-577-8477.

[Featured image: Kay Thomasson/Sandy Springs Police Department]