Just wanted to make few points:
Wi-Fi and Alarm System at Mrs Guthrie’s House
Even though she doesn’t have a Nest Subscription account, there should have been multiple notifications on her phone through Wi-Fi when there was so much activity on multiple cameras around her house. Also, given her medical condition there are probably more people on that Nest account and they should all have received notification too through Wi-Fi Internet even though they were not there.Any one could have called for help after seeing that boogieman around the house.
It’s also hard to believe her Security Alarm didn’t go off when someone tried to break-in in the middle of the night and automatically dialed the alarm company. I am sure she has an alarm system for such a big house.
The only explanation is that someone with
Means disabled both Wi-Fi and Alarm before this creep showed up hence no notifications and 911 call.
Doorbell Footage
Any server that logs data always has a timestamp attached. The fact that FBI has not released timestamp in the video is very telling.
I think this video is probably just before he was planning to bring Mrs Guthrie out of the house. He knew the camera is disabled because nobody showed up at the house but came to double check from the garage or side of the house with his face completely covered and no gun. But due to the battery in the doorbell and motion sensor the light went off which confused him. He didn’t want the light to go on when he would bring her out.So he decided to come back and cover the camera. He had to wear the mask correctly this time so he can see and has the gun too just in case. He taps the camera to see if it’s working and also checks the door knob with his left hand to make sure it’s open. He is so calm because he thinks the camera is not working, it's just the light and tries to find something to cover the light because the light will go off again when he brings her out. When he came out for the last time, he paused around the doorbell to take it out and probably that’s why there is more blood of Mrs Guthrie around that spot

Timestamp on the footage will clear this up.
Kidnapper - Electronic Devices and Car
I don’t think there was any kind of traceable electronic device on him. Also, his car doesn’t have GPS or any kind of traceable device either. Otherwise LE would have found some solid electronic/digital lead by now. Due to lack of it they have to try to figure it out through DNA or Pacemaker ping. Everything was setup for him to walk-in and commit this heinous crime and leave without any trace. He was told to leave all her traceable devices behind too. Hopefully he made a mistake inside the house.
Motive
I think probably both financial and some kind of resentment.
Opportunity
Feb 6-8 was a very rare weekend for NBC when it hosted both SuperBowl and Olympics which probably will never happen again. Since Mike Tirico was occupied with SB and would have hosted the opening ceremony if there was no clash, this was a rare opportunity for Savannah Guthrie to host the ceremony. I think the kidnappers knew this and saw it as a perfect opportunity hoping she would pay up immediately and go to Milan.
Something went wrong during the kidnapping and they were not able to provide proof of life which forced Savannah to wait and it spiraled from there
