Wanted: Anyone who witnessed a family's "strange behavior" following the murders of two Virginia Tech students.
The young couple was from the Lynchburg area.
Police said there were a lot of activities going on during the time of the murders.
Investigators believe they haven't talked to everyone who may have information that could help them.
One of the detectives asked anyone to contact them if they saw family members exhibit behaviors like going to church more often, or being obsessed with the case.
Also today, the reward for information in the murders was increased to $70,000.
Anyone with information should call the Montgomery County sheriff's office at 540-382-6915.