TexasCHLforum.com

Some juggings are facilitated by a dirty bank teller who lets her gangster friends know who just made a large cash withdrawal.
Then the BG's know who to attack and how much they will get.

Another M.O. that the juggers use is to sit a little ways away from a bank, glassing (using binoculars) the exit doors from the bank.
If they see a person carrying a bank bag, or a big envelope, they assume it's full of cash.
They follow the person until the person parks and goes into a store.
Then they break into the car and steal the cash.

SIA