Killer in Plain Sight S02 E16 Satanic Homicide

"One killer... Multiple suspects... But nothing is what it seems."

When two friends are shot to death in their beds, the words "Satan loves you" is left as a message in the kitchen. As the case widens, it becomes clear that there are several people who may have wanted these women dead, and Satan isn't one of them. [also shown as S1:E38]