In a statement read by barrister Jake Richards after the case concluded, the family said: “We have no answers as to why the police didn’t ensure Christopher’s door was appropriately secure.
“All we want are answers so Christopher’s death is not in vain and his legacy can be the protection of other vulnerable individuals.
“This allowed a drug-taking killer to simply wander into his property.”
The statement added: “The failure of the coroner, the police, local services and the national government, including the Care Minister, to undertake a full and fearless investigation into Christopher’s death has only deepened our distress.”
Craig was jailed for life for Mr Laskaris’s murder in May 2017 and told he must serve a minimum of 25 years.
He had been released from prison on licence in February 2016. He was recalled to prison three months later after he was charged in relation to allegations of domestic violence but was released again in September 2016 when the charges were dropped.
In November 2016 he then stabbed Mr Laskaris to death, before returning to steal from his flat days later – and even rifled through his pockets as he lay dead on the floor.