thinking out loud... bear with me....~
why end a five day search at three days? Especially a huge task such as sorting thru a specific spot in a landfill for a specific "LIST" of items (stated in media article previously linked here)?
Either they:
1) found what they were looking for and are not disclosing that to the public
2) they got done early searching tons of garbage
I am thinking they found something but are not disclosing it at this time to the public but that is just my opinion.
They said that they didn't find the mattress in the landfill. Maybe they found the mattress somewhere else, like the woods.