Who is Mike?

During the ‘A Body in the Snow’ TV special David Yanetti mentioned getting a phone call from someone named ‘Mike’ telling him that they need to look into the other people who were at 34 Fairview that night.

Having followed this case since the second day of the last trial, this is the first time I have heard about a ‘Mike’ being mentioned.

Is this a new person involved that we have never heard about? Or do people think that they’re using this name as an alias for Steve Scanlon?