If LE wants to keep details of the case quiet, they would be crazy to share them with Hosko. I think if LE wants to give out information, they'll do it themselves. JMO
Having read a bunch of the transcripts of Hosko on MSM opining about the case, it doesn't appear that he has any more information than we do. He has said a lot of things in addition to the quote about LE having time to collect forensic evidence at the house. A few examples:
* About JW lying to investigators:
"If you're lying about something that seems inconsequential, than usually there is a reason for that," Ron Hosko, the former Assistant Director of the FBI explained. http://www.wusa9.com/story/news/local/dc/2015/06/04/police-search-car-savopolous-assistant/28493037/
*
Former FBI Director Ron Hosko says detectives are trying to find if there’s any connection between Wint and Wallace. http://baltimore.cbslocal.com/2015/06/04/investigators-reveal-new-clues-in-dc-mansion-murders/
*
"It is incredibly brazen. Shows an element of calm that the person didn't feel rushed." and
"Certainly, he was sadistic killer. The son might have been used as the tool to make sure the parents were compliant."
http://www.cnn.com/TRANSCRIPTS/1505/21/ebo.01.html
* About SS' VM to NG:
"Well it's going to tell me one I need to get that recording analyze to see are there extremeness noises that are spiking up in the background." and
"Is that somebody in the background under the rest hollering?" On AS text to NG:
"That would indicate that the event has started that the offender or the offenders are in the house with Amy that she's under their control." On DNA on the pizza crust:
"That looks like the pivotal piece of evidence." On Savvas calling AB (VF's husband) on Thursday morning:
"Well, certainly that Mr. Savopoulos is still alive, the manipulation is ongoing because the plot to deliver the money is still on working progress." On the victims being stabbed:
"It seems as though the killer enjoyed going about his work." On the well-groomed man seen driving the Porsche on Thursday:
"Is this a coconspirator? Did he call a friend and say, "Come get this car for me?" And if so, who's the friend?"
http://edition.cnn.com/TRANSCRIPTS/1506/23/csr.02.html