'We know more time online means more direct access to children, including those who intend to harm them,' a statement read.
'We believe a total of six letters were sent: one to the White House and five to Texas.'
'Never in my entire career as a superintendent have I had that happen before.'
Several people came forward with information and helped law enforcement officials identify Espriu as the arson suspect.
Brown's online demonstration comes on the heels of renewed police reform demonstrations following the shooting of Jacob Blake.
'We're fine. Everyone, we are fine,' the reporter can be heard saying after debris and glass rained down on her as she ran up the steps.