The mother of a young dad violently murdered in his own home in front of his two children has issued a heartfelt appeal for information.

Karen Nicol told how her life had been ruined after son Christopher was stabbed at his flat in Greenock during a botched robbery in September.

Police believe Christopher, 27, was targeted because the killer thought there was a large sum of money in the flat, which was not the case.

Mum Karen, 52, has now called on anyone with information to come forward.

Speaking at a police press conference, she said: “I am devastated by the tragic death of my much-loved son Christopher. Our lives have been changed forever."

READ MORE: Father stabbed to death in front of his two young children

"He was a brilliant Dad to his two young children, whom he worshipped and would have done anything for."

"The man responsible has taken one life and ruined the lives of all our family. Please, please if you have any information that will help officers, then call the police or Crimestoppers, as soon as possible."

Mr Nicol's traumatised children, aged five and six, reportedly told officers a "bad man in a mask" attacked their dad after arriving at the scene.

The suspect is described as white, between 20 and 30 years of age, with a local accent. 

He is thought to be around 5'9 and of slim build with an unkempt, reddish, brown beard and moustache. 

He had bad teeth, with some visibly missing and was wearing a black beanie hat with a logo, possibly Timberland, black top and black jeans or bottoms.

READ MORE: Tributes pour in after Greenock father Chris Nicol is murdered in targeted attack in front of family

Detective Chief Inspector Martin Fergus from the major investigation team said: “Throughout the last fortnight, extensive inquiries have been ongoing to trace the man responsible for Christopher’s violent murder. "

“Although I am encouraged by the public response to our previous appeal, I am in no doubt that there are people in the area who may have seen or heard something, and we still need to speak to them urgently. 

"Although people may think the detail they hold is insignificant, it could indeed be that smallest of piece of information that moves our investigation that crucial step forward."

He added: “If there is anyone you know who is acting differently from usual, or who may have become withdrawn then please get in touch.  If anyone has overheard anything or has suspicions about someone, then please let us know."

"This man was violently attacked in front of his two young children and I do believe that somebody local knows who is responsible. Therefore, I am again urging anyone who holds any detail on Christopher’s death to do the right thing and come forward.”