Sinn Féin suing SDLP over McCartney murder claims?

As the McCartney family’s campaign continues, today they’re travelling to Brussels to meet with European Parliament President, Josep Borrell and other MEPs, it appears that the first court action taken in relation to the murder will not be a criminal case, nor a civil action against those the family have claimed are reponsible – instead, according to the SDLP website, there has been a writ issued by SF’s Alex Maskey against the SDLP deputy leader Alasdair McDonnell.