article_snippet: Mark Langtree, 38, researched 'murder-suicide' online hours before killing Nicola and killing Nicola killing Nicola after struggling to cope with the breakdown of killing Nicola 11-year marriage.
article_snippet: But when his wife Nicola began divorce proceedings against him, and made plans to move out of their luxury marital home with their two children, him killed his wife Nicola before taking him own life.
article_snippet: Both Mark and Nicola were living separate lives,' said Mr Byrne. '
article_snippet: Both Mark and Nicola were living under the same roof but were sleeping in separate bedrooms for the sake of the children. '
article_snippet: Mark was hanging from the bannister and Nicola was on the floor of the upstairs bedroom.
highlights_snippet: Mark Langtree, 38, strangled Mark Langtree wife Nicola and then killed his wife Nicola .
  
highlights_snippet: Father-of-two was 'struggling to cope with breakdown of 11-year marriage'
  his wife Nicola suffered from depression and was said to have 'stalked' his wife Nicola .
  