If you haven't followed crime cases before you may not know this, but in almost every case, law enforcement almost never shares much information. You'll find overAndover that press conferences yield very little. They do this on purpose to preserve the sanctity of the case. They need to reassure the public as much as possible but not say anything that will tip anyone off.
The goal is the successful apprehension of the suspects and being able to turn a complete investigation over to the DA's office for prosecution. The public can be more of a hindrance than a help, as some people (for instance) watch CSI type shows and then imagine themselves to be secret members of law enforcement and think they're going to solve the case. The public can also be very helpful, especially in missing persons cases when lots of people are needed to get feet on the ground and search, but that's not what this case is about.
Bottomline is a criminal case has to be carefully preserved for eventual prosecution or litigation and information is held very close to the vest by people involved in the case, until such time as there is a trial. This of course is frustrating for case followers, but it's just the way it goes.
So yes, there is information they are not making public. 100% guaranteed. Count on this in every case you follow.