The sister of a teenager who vanished 22 years ago has appealed to serial killer Peter Tobin to tell her family if he killed the missing girl.

Nicola Stork, 44, said her family had been through a living "hell" not knowing the fate of her sister Louise Kay, 18, who disappeared on June 23, 1988. Louise had been to a nightclub with friends in Eastbourne, East Sussex, and was last seen dropping off a friend nearby at 4.30am in her father's Ford Fiesta.

With the announcement that Sussex Police were this month searching two of Tobin's former homes 25 miles away in Brighton, Mrs Stork hoped closure would come. But last night, detectives said that searches at one of the properties where the Scots handyman lived in the 1980s, in Station Road, Portslade, had found no fresh evidence linking him with further crimes.

As officers now concentrate their efforts on the second address, in Marine Parade, Brighton, Mrs Stork called on 63-year-old Tobin to acknowledge whether he was responsible for her sister's killing or not. STV News has learned that Tobin moved out the Station Road property the same month as Louise went missing.

Speaking from her home in Eastbourne, Mrs Stork said: "I know it's not going to happen but I would say to him, 'Give us some sort of closure to the last 22 years of hell'.

"If it's him that's killed Louise, then that's what he has put us through. Has he not got any sort of conscience?"

She added that she believed Tobin was deliberately withholding information from the authorities as a sign of power over the families of missing loved ones.

Mrs Stork, married with twin teenage sons, said news that no criminality was linked to the Portslade address had caused her to feel a mixture of "disappointment and relief".

She said it was frustrating for search teams not to turn up any fresh evidence but that the absence still left open the possibility that her sister may still be alive.

Mrs Stork said: "You go through so many emotions, you think, 'This is going to be it'. But even though I'm disappointed, I still feel that there is hope as they are still looking at the property in Marine Parade."

She added that closure was long overdue, particularly for her elderly parents who were now in their seventies.