Man hid in ex-girlfriend's flat before stabbing her new boyfriend

A Dublin man who stabbed his former girlfriend’s new partner after hiding in her flat to confirm his suspicions about her new relationship has been jailed for seven years.
Mark Byrne (aged 42), who had become fixated on the woman’s new relationship, used a knife from her kitchen to inflict a life threatening kidney injury on her new boyfriend as he struggled with the couple when they returned to the flat.