According to the 911 log, 'yelling' was heard during the 911 call - so perhaps after analyzing the call, they could determine that one of the voices heard was Jayme's? Could that be how LE *knows* Jayme was at home at the time?
From the 911
"[115 - 10/15/2018 00:56:01]
RECEIVED A 911 CALL FROM 715-418-5924 AND COULD HEAR A LOT OF YELLING. CALLED NUMBER BACK AND WAS UNABLE TO LEAVE A VOICEMAIL. PHONE PINGED TO THE ABOVE ADDRESS. ADVISED 317,325, & 329."
I definitely believe this is one of the reasons they know.
They are not going to release all they have discovered on the enchanced 911 call nor should they.
If this suspect is caught the enchanced call will become an important piece of evidence at trial.
Imo not only did they hear yelling and imo the voice they heard was not Denise but Jayme. Plus I suspect the suspect is also heard on the call.
If and when he is caught the FBI's voice analysis experts will be able to compare the voice tone on the call to the suspect.
This is also how LE knows Jayme isn't a runaway nor a suspect in this case imo.
Fitzgerald is going to keep all of this to himself as to what was actually heard on the call.
He will continue to be dismissive pretending nothing much was heard. As we know law enforcement officers can lie about anything in order to protect the integrity of the case.
Plus imo he wants the suspect to think they couldnt make out what was being said. They want him to feel at ease thinking they have nothing. We have seen this same ploy used before.
Fitzgerald knows whoever this is probably is keeping up with everything said by him in the media.
Imo the FBI profilers are telling him to stress they didn't recover much if anything when they enhanced the call.
Even though the suspect may have been in the home for four minutes that is ample time for them to have touched something leaving their DNA behind.
Rarely are there truly perfect crime scenes. 99 percent of the time they will leave something of themselves behind. It could be fingerprints..fibers or sweat or skin cell DNA or other trace evidence.
So the next thing I hope to see is Fitzgerald saying they are finally getting some of the lab results returned.
Also even though he says they have no suspect in mind doesnt mean its necessarily true and just may be a way of not alerting the suspect until they have enough probable cause for an arrest warrant.
So I do have positive thoughts this case is going to be solved in the coming weeks.
Jmo