The second quickest way would be to crack Cassandra's computer and snag the raw data from her files.
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"Mia Sanders is working at a pizzeria across the street," Stefan Wildner told his superior as his fingers danced across the keyboard to manipulate the timeline of the GPS tracker inside her security bangles. "Yesterday at 6 PM, after her shift ended, she went to a bar close to her current house. She was there until approximately 9.10 PM, and then she slowly headed home. She arrived home at 10.00 PM and stayed there until morning."
"Ah."
Maximillian stroked his chin, his gaze drifting into the distance.
So they were celebrating at a bar, far far from the Bureau's headquarters. While he couldn't verify Julian's location that night, the story held water as long as Mia backed it up. For now, there was no need to question Mia about this matter, lest he end up upsetting Julian.