Trevor Lunn MLA said: “This despicable and deeply tragic event has shocked the local community.
“I am extremely saddened at the death of Darren Roberts and I want to pass on my condolences to his family.
“You simply don’t expect incidents of this nature to happen in Lisburn. Knife crime is a problem that Northern Ireland must be vigilant against.
“I would call on anyone who can help police with their investigations to contact them immediately.”