A news outlet that had previously received a communication from the "kidnapper," received another communication. It appeared similar, and included some detail that would supposedly verify that they were the same person who sent the previous communication.
This communication was sent through the newsroom tip system, and wasn't an email as we had previously believed. That's likely the case with the communications the other station and TMZ received in the past, but not a fact.
After this communication, police returned to the house. They were spread out all over the place, seemingly looking at different things. They may have removed a camera from the roof area of the house.
That's pretty much it.