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A $28,500 deposit was made to Syed Farook’s bank account on or about Nov. 18, some two weeks before he and his wife, Tashfeen Malik, carried out the San Bernardino massacre, according to reports.

On or about Nov. 20, Farook reportedly converted $10,000 to cash, and withdrew the money at a bank in San Bernardino. Afterwards, in the days before the terror attack, there were at least three transfers of $5,000 that appear to be to Farook’s mother.

On "The Kelly File" tonight, counterterrorism expert Dr. Sebastian Gorka said that this is the "smoking gun" that could tie the deadly San Bernardino attack to the broader global jihadi movement.

"If we can demonstrate that this is connected to the attack - whether it was used to buy the weapons or whether it was used in advance as some kind of bounty, if you will, to pay for relatives or pay for the operation prior to the attack - well, then we've just got the smoking gun," Gorka said.

Gorka explained that would show that this isn't just some isolated couple that radicalized and followed the road to jihad, but part of a larger conspiracy.

Watch more above.

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