While I have no basis for this, I do think it's possible that LE has been conducting ground and/or water searches but without help from the public.
Farmington Hills police chief Chuck Nebus released a statement on Dec. 23. In it, he said, "Farmington Hills detectives and investigators from several other agencies have been involved
in searches and the collection of evidence at numerous locations over the past three weeks." (BBM)
The only search location I am aware of is the house in Berkley in which SG lived.
Whether SG had anything to do with the crime, it is easy to assume that LE is keeping a close watch on him; however, no one is yet in custody. It would make sense to me that LE would be very careful not to disclose search locations, when there is still a possibility of someone being tipped off and interfering or tampering with potential evidence.
I have no idea how many people know where Danielle is, but if more than one, especially, it may be difficult for LE to identify and keep an eye on every single one of them 24/7. With enough probable cause, they may be allowed to monitor someone's communication with others, but more than ever, there are so many ways to get in touch with someone. Also, what if someone is staying at a location with phone or internet service in another person's name, and/or access to someone else's cell phone? Possibilities are endless.
IMO, it's not entirely inconceivable that perhaps LE, at one point, was able to track Danielle's -or her cell phone's- movements for Dec. 2nd and 3rd, and followed pings, etc., but she and/or the phone had already been moved. It's not entirely inconceivable that someone who may or may not be on LE's radar right now would try to plant some random DNA near Danielle in order to raise enough reasonable doubt.
LE has been so unusually tight-lipped about everything with regard to this case, and I really don't believe it's due to lack of evidence. I can't help but think there must be something unique to this case that makes it absolutely necessary for LE to operate in this manner.
Source:
http://detroit.cbslocal.com/2016/12...ills-woman-brings-police-to-house-in-berkley/