Well in short, yes it is possible but I think probably quite unlikely.
As far as I know, you would only be summonsed (I think that''s a real word) to a fact finding hearing, which is unlikely to take place for several months.
If you are committed to helping, you may find that providing a statement gets you off the summons hook. On the other hand it might make it more likely that you will get a summons because the other party may want to question your evidence.
Is the issue so serious that your conscience won''t let you back out of it now?