Would it be worth digging on this witness guy? He's pretty shady and his references to "the russian connection" among other things leads me to believe he might be lying.
Here's what I got so far
He works in security, he was doing the interview from his work, he has to go at 2:30 PM (closing time?), there's a sliding door in his building, we have his voice on record, he responded to "Is this Luke?" before Jack Burkman said "we're calling you Luke for lack of a better name", he worked in intelligence, and he also worked in a setting where there were people from the ATF and DEA getting together in his presence.
What does that narrow it down to?