User @source101 appears to know Mr. Brewster since before he went to Cyprus, and his unique informations have not been shown to be incorrect yet:
https://bitcointalk.org/index.php?action=profile;u=301800;sa=showPosts;start=0

Besides describing Mr. Brewster's background and (lack of) qualifications he offers some interesting points:
1. Mr. Brewster's cars were being shipped out of Cyprus (2014-03-25 08:55:16).
2. Mr. Brewster and his fiancée were still in Cyprus shortly before Mar/30 (2014-03-30 04:57:00)
3. This is the third time that Mr. Brewster set up a business that failed (2014-03-30, 05:48:32)

Point 1 is interesting only because other posts have claimed that the cars were being sold in Cyprus. ("The Bentley was spotted in a dealership with changed plates" -- Hm, how did that poster know that it was the same Bentley?)

Point 2 is surprising since many people were already looking for him at the time, weren't they?  However it may not contradict the employees' accounts; I don't recall whether they claimed that he left Cyprus much before the 30th.

Point 3 is interesting because, if true, it is just amazing how that fact could have gone ignored for so long.