David Lee Lamm, 54, was shot to death at his rural Solsberry, Indiana, home on July 18, 2014. His body was found in the driveway of the Greene County residence. Inside the house, his wife, Fitri Amanda Lamm, had been bound with rope and duct tape and had been sexually assaulted by an intruder after David’s killing; she survived the attack.

Investigators identified two persons of interest and arrested Kevin Vern Caldwell, 41, on July 20, 2014, and Jason Lee Caldwell, 35, on July 21, 2014. Jason Lee Caldwell was charged with murder, rape, criminal confinement, and burglary; authorities say he waited at the Lamm residence for David to return, shot him on arrival, then entered the home and attacked Fitri. In November 2014 Jason Lee Caldwell pleaded guilty to murder and rape and was scheduled for sentencing in December 2014.

Does anyone have information about the night of July 18, 2014, or about activity near the Lamm home in Solsberry that could help the investigation?