Hmmm. At some point the case was changed from a missing person to a murder. I'd like to know the background of how that decision was made. Did they make that decision once Anna's car was found? Are the police now saying it's not possible for her to be missing, or that it's more likely she was murdered?
Also, I saw an interview with a PA State Trooper who said they believe Allen Gould has additional information and that they'd like him to come forward with that information. That won't happen and the State Police know it won't happen. That seems like an excuse for them having not solving the case yet.
It likely started after Anna's car was found. Anna's car, like most modern cars, has a hard drive in it. All kinds of things are logged/recorded to that device. Her model car also comes with a GPS system. When you have such things, regardless of whether or not you pay to use the GPS service for things similar to OnStar the system still records location information. It does so because GPS is passive i.e. it is a receiver only.
In addition there is the "black box" that modern cars have on them. They record the times of the last time few times the car was started as well as the status of any number of components of the car.
Between these two things law enforcement should know when Anna's vehicle arrived at the location it was found and they may also know of other locations it was at and/or waypoints along its travels.
I strongly suspect that whatever dates/times were recovered from the car's computers are not consistent with the time frames stated by Allen during early interactions with police. This time frame may also be inconsistent with phone records i.e. her car may already have been at the location where it was found while her phone activity (text messages/e-mail) was located at the home.
Also, we have no way of knowing if law enforcement used cadaver dogs to check the car after it was impounded and/or any evidence of foul play was recovered from Anna's vehicle.
Law enforcement waited almost a year to declare that Anna case was a homicide but they likely already knew that for 9 months or more by that time. The purpose of not revealing that was the gamble that Allen would speak to law enforcement because it was "just" a missing person case but that didn't work out.
I could be wrong, of course, but this what I think played out.