Here I will list the evidence in this case that I believe is probative, and assign probability values to them. And then calculate the probability of guilt.
Evidence pointing to innocence:
1. Evidence of a break in. There is a cut screen and a bloody finger print that could not be matched to anyone in the house. The evidence of breakin is kind of weak, but there nonetheless. I estimate this evidence as having a probative value of 40% --> Pointing to Routier's innocence for 60% or 40% guilt.
The investigation showed the screen had most likely been cut with a knife from the butcher block set in the kitchen and a layer of dust on the inside windowsill had been undisturbed.
2. Routier's wounds do not appear to be self-inflicted. I am no expert but from the descriptions and pictures I've seen, I think it is unlikely she caused them herself. Guilt value: 35%
Luminol discovered blood cleanup on the counter surface all around the sink, as well as cleaned up drips of blood on the floor in front of the sink where someone apparently stood in one place for some time dripping blood. There was no appreciable amount of blood found on the couch, where Darlie claimed to have been when the intruder inflicted her injuries. Detectives theorized Darlie inflicted her wounds to herself while standing in front of the kitchen sink. There was one child's handprint in blood on that couch, but it had been cleaned up and was discovered with Luminol.
Darlie's wounds were of a completely different severity than those of her sons, in the opinion of the medical examiner who performed Devon's autopsy and also examined Darlie.
3. Routier's sons were alive when she called 911---one was still alive when the police arrived. Why would a murderer call 911 before her victims were dead? She changed her mind? She thought they were dead? or was she not the murderer? guilt value: 25%
The one son was already dead at the time the husband reached him, the other barely alive at all, with just a hint of a pulse. When the police arrived, they instructed Darlie to put pressure on the wound of the one barely alive son, She ignored the request.
4. The bloody sock. It is unclear how Routier could have planted this. An intruder may have used it and dropped it while he was running away. Guilt value: 40%
It seems she had ample time to clean up and stage the scene. I am sure this was part of it. Thank god it didn't succeed in getting her off.
Here are a few more tidbits:
"They" vs "he":
In the 911 call, Darlie said, "They came in and..."
By the time detectives arrived, this had become "He...," as she changed her story to a single attacker.
The supposed exit of the intruder was through the utility room and through the garage, yet there were no lights on and it was said to be a type of obstacle course to get through there, an unlikely means for escape without leaving bloody evidence. There was no blood in the garage nor on the fence an intruder would have had to have passed to escape that way. Also no blood on the difficult-to-open gate through which an intruder would have exited. Flower beds between the garage and the gate were undisturbed. The garage door was closed and locked from the inside.
Bloody bare footprints from the kitchen heading into the family room belong to one set of feet which matched Darlie's. There were no bloody prints leading to the utility room and none in the utility room or the garage.