I agree. First the family, then KD, and various others seem to believe it's the job of police to share all their investigative efforts so that these other people can solve the crime, independent of police.
I'm not quite sure what the idea is. Once they solve it, are these independent sleuths intending to arrest the perps themselves, charge them and prosecute them at trial? Or is the goal to first publish "I/We solved the crime based purely on thinking about it!", then forward a link to police, expecting them to mop up the details by doing the minor, unimportant job of providing proof and then making arrests.
IMO, speculation is just speculation, anyone can do it. Police don't speculate, they collect actual evidence and investigate it for the purpose of proving beyond a reasonable doubt.
JMO