And for a very good reason - by law they are prevented to release such information if they are participants in the investigation.
Thank you olasek. This bears repeating (repeatedly). Anyone who is involved in the investigation is under an effective gag order (been there, experienced that). All public release of information must be approved and released by the responsible investigating agency, and unless the investigation uncovers a potentially urgent safety concern, there is no obligation to publicly release information related to the investigation.
Breaking the 'gag order' during an active investigation can result in serious repercussions (including loosing ones job).
In short, keeping the peanut gallery informed and entertained is not their job.