[jdm]

Is his middle name Igor, by chance? A paper came out today, supposedly confirming the murderer's name, but due to "legal reasons" could only print the middle name, which was Igor.

[GarySpFc]

No, his full name is Boris Abramovich Berezovsky.

[G8 Diplomat]

Is his middle name Igor, by chance?

You can't have a plain first name as a middle name in Russian. The middle names are always the father's name followed by end -ovich/-evich or -ovna/-evna.