The Douglas County coroner reported Friday that 65-year-old Roger Brumback died of a gunshot wound and his wife, 65-year-old Mary Brumback, died of stab wounds.
Their bodies were discovered May 14 in their home near 114th and Shirley. Omaha police have been trying to determine if the killings are related to another double-homicide five years ago.
11 year old Thomas Hunter and his family's housekeeper, Shirlee Sherman, were found dead inside the Hunter home in Dundee in March 2008. The case remains unsolved.
Both sets of murders have a connection to the Creighton Pathology Department, where Thomas' father was a colleague of Roger Brumback.
Omaha Police say anonymous donors have raised the Crime Stoppers reward to $25,000 for information leading to the arrest of those responsible for the murders.