A handwriting expert with the U.S. Secret Service is one of several federal agents assisting the Dunwoody Police Department with its investigation into the killing of an elderly Dunwoody couple.

The bodies of Roger Abbott, 82, and Dorothy Abbott, 78, were found inside their burning home on July 1.

In addition to the Secret Service, investigators from the FBI and the Federal Bureau of Alcohol, Tobacco and Firearms are assisting as well as the Georgia Bureau of Investigation, the DeKalb County Fire Department and the Sandy Springs Police.

“The Secret Service can help us with calligraphers and stuff like that,” said Dunwoody Police spokesman Sgt. Mike Carlson. The FBI is helping with the general investigation. We’re seeking all the help we can get.”

Police have said that arson is suspected but no motive or causes of death have been given for the killings.

“We’re still investigating, and we have not named any suspects, but we’re following certain leads,” Carlson said.

Carlson said neighbors and relatives of the Abbotts are being or have been questioned. According to a neighbor, the Abbots have four grown children, including one with special needs who lived at the home but was away at a camp at the time of the fire. Carlson would not say where the other children live.

Police have not released many details regarding the crime scene and the investigation, but Carlson said the department is planning to meet with members of the community to discuss the case. However, he said no new information will be given at the meeting.

“We understand people want to know more about what’s going on, but right now we can’t give any more information,” Carlson said. “We don’t want to jeopardize the investigation.”

Carlson had no comment when asked about the state of the bodies when they were found or if there was evidence of forced entry. Dunwoody police chief Billy Grogan reiterated the concern for keeping the details of the case from the public.

“In this particular investigation, the release of specific information such as cause of death, details of the circumstances of the deaths, or any investigative leads could potentially harm our investigation and could possibly interfere with our ability to successfully prosecute a suspect or suspects in the future,” Grogan said.