Criminal investigation launched into north-west landslide A criminal investigation has been launched into a devastating landslide which transformed a natural beauty spot in the north-west into a murky “black porridge”. Shocking footage of the incident in Mid-November was viewed by thousands online as it showed thousands of tonnes of peat slipping downstream from the top end of the Mourne Beg River in Donegal. John McCartney, director of conservation and protection at the Loughs Agency, told the Stormont Agriculture, Environment and Rural Affairs Committee on Thursday (January 21) that the resulting damage had been so significant that it had affected fisheries downstream in Northern Ireland several miles from the site.