"I want him to suffer and feel pain."

Those are the hearfelt words from the father of murdered teenager Dinah McNicol, after declaring he is to send an open letter to her killer Peter Tobin in jail.

The 15-year-old girl's remains were found in a Margate garden close to those of Vicky Hamilton three years ago.

Ian McNicol, who lives in Essex, said he would be writing to Tobin as part of a "mind game" to trick him into revealing more about his past to the police.

He said: "I didn't know I was allowed to write to him. I will ask him why he killed my daughter and Vicky and brought their bodies to Margate. I can write an open letter to the governor of the jail where he is held, but I will also send a copy to be placed on a prison notice board for others to see.

"There are a lot of hard men in our jails who are also family men with children and grandchildren and they don't take kindly to the crimes Tobin has committed.

"This is a mind game and when I was younger I was very good at them."

Mr McNicol said he got the idea of writing his letter in October when he met Vicky's parents at her graveside in Falkirk, Scotland. Michael Hamilton told Mr McNicol he had already written to Peter Tobin asking him why he killed his daughter, but had not received a reply and would be contacting him a second time.

Mr McNicol added: "I don't want Tobin dead, I just want him to suffer in so many ways. It's a way of sticking needles in him which will make him so angry he might just open up more about what he has done to others. He wants to go down in history as a serial killer, but he is a nobody."

A permanent memorial to the two girls should be unveiled in Margate in December, which will be attended by both families.

Tobin dropped his appeal against his life sentence recently for murdering Dinah McNicol, Vicky Hamilton and Polish born student Angelika Kluk, whose body he hid in a Glasgow church in 2006.