A major finding of the 9/11 Commission study was that LEO agencies had "stove piping" of data. IOW they did NOT share data.
The FBI and CIA and DIA and others, did not inform their counterparts, of vital information about dangerous people and situations.
There was much talk vowing to do better.
Now we see where 26 people may be dead, due to the same shortcoming of LEO data sharing.
I have noticed this type of shortcoming is merely taken in stride, by government employee types, including LEO.
I live near a locations where 3 different jurisdictions come together; namely city, county and state.
Officers use "field interviews," to note contact with dubious individuals. It is sort of a first warning eg. "I've noted our contact."
The bad guys benefit, since the 3 jurisdictions don't communicate with each other.