Hmmmmmmm....has it ever been suggested that the prosecution may also have posters on these boards? Seems like they would need it more than the defense. But - I don't think either side has anyone posting on any boards....they may be looking but don't really think they have the time and resources to plant people on these boards.
I have seen office mates of both sides with this and two other sites like it up. They are not folks we have seen on camera in the trial, but they were affiliated with either the DA's office or K and B.