jessie goslyn and jarred long were charged with the murder of jessie's husband, army sergeant vince goslynld police that she and jarred had hatched a plan to ambush vince. her confession was the linchpin of the prosecution's case. then, the investigation took a stunning turn-- now, to the conclusion of "evil was waiting." prosecutor lynn pryor already felt she had a solid case against jarred long. and after his arrest, police found even more evidence in his truck. lynn pryor: there was one spot of blood that belonged to vincent goslyn on the backpack of jarred long. narrator: this is bingo right here. lynn pryor: this is more evidence than i've had in most of the murder cases i've prosecuted. how do you explain the victim's blood on your backpack when you're hundreds of miles away? you can't, unless you're the person that killed him. narrator: but pryor knew the case against jessie wasn't as airtight. lynn pryor: it was very much a circumstantial case because there was no physical evidence implicating her. did you worry that that wouldn't be enough to get a conviction? somewhat, yes. jarre