My theory on this is that they thought Beverly was still alive at this point and they wanted Pics of proof of either where she was or if she was alive.
Ive said once before that i think a ransom was made to the family and LE got involved. They were telling people to check abondoned sheds etc on their properties. IMO they believed her to be alive because they had a kidnapper demanding ransom and telling the family she was still alive.
I think a ransom demand was made..... LE and family has just held that detail close to their chest.
All IMO and MOO
They only began to ask people to start looking at abandoned buildings on their property during the period of 10 or so hours they were questioning AL. The three or so days prior to that, I don't recall them mentioning anything about looking in abandoned buildings on your property for her. This makes me think that AL was giving partial truths, dancing around the facts during his questioning. I personally feel like if a ransom demand was made, it may have been before Carl Sr's first interview, where he asks for someone to "just drop her off on the sidewalk".
I don't understand if LE would allow family/friends/strangers to search that area all around the house for days, if they thought she was in an abandoned building based upon knowledge that they were just keeping to themselves.
Just my random thoughts! I'm exhausted and this may have not made sense! All my opinion!