[Larry Lucido]

Investigators are still puzzled as to how Frost knew the exact moment when the teller would have $90,000 sitting out for him to snatch

Might want to check the teller's cell-phone log.

[healy61]

Or, another employee who could watch the different monitors, then make the call to the now-late Mr. Frost.

[going hot]

Excellent advice to Joe friday