I agree. And yes, they would have needed a warrant. And yes, Gannon was too old to have gotten himself in the truck and not be able to yell, scream and kick to get someone to let him out. LE uses common sense, they do not conduct searches without warrants. If Gannon had been known to have some kind of severe intellectual impairment, they may have asked her if she had checked the vehicles (she would have said yes).
Instead, they went through their usual protocol for child runaways, including some type of general announcement to the public and to squad cars, such that the



and Go in Fountain thought they had video of Gannon (it wasn't) by Tuesday.
Did both Stauch children sleep in the basement? So as to be not seen and not heard? Did HH have the upstairs bedroom? To me, from the various leaks of pictures and videos, and now the AA, it seems to me that both Laina and Gannon were in the basement.
If I am understanding the timeline properly, LE believe that LS murdered Gannon in his bed, in the basement, between 2:20pm and 3pm on Monday. She then put him in the Tiguan, met Laina and got her bike out for her, sending her outside to play. She then cleaned the bedroom well enough that no blood spatter was visible (the AA shows a fan shaped spray that's at least 8 feet across at its widest, with more saturation/spray near the head of the bed; the stain on the mattress is consistent with a severe head wound).
At almost 7 pm, after conversations with Albert, LS dials 911 to report a runaway. The police enter the information into a database (and put out some kind of alert for officers to look for Gannon). They arrive around 10:30 and are permitted into the house and yard, where they briefly look for signs of Gannon. Apparently, LS tells them she has no idea what friend Gannon was going to see. LS makes no attempt to search for Gannon, neither does HH (who was earlier sent with Laina to Dollar General to pick up a few things, giving LS more time to clean).
Next morning, LS goes in the Tiguan to the CoS airport, where she rents a car and picks Albert up around 8-9 am. He meets with LE and of course, takes a look around the house. Unclear what LS is doing that day. Does she go back to the airport, take the Tiguan and hide Gannon in northern CoS?
Whatever else happened on Tuesday, Albert must have noticed something up with the carpet, as eventually LE gets very interested in the carpet issue. Apparently no one took the sheets off of Gannon's bed that day (or did they?) Albert notes that the bed is in an unusual position (so that LS could get behind it to clean the wall). It's possible the bloodstains were seen that day. If so, it's so hard for me to understand why LS wasn't arrested as soon as the DNA results came back...