One of his victims, and her mother, told the BBC of their experiences of Lindsell.

I'm 14 now and I was 13 when this happened.

I was just on the chatroom and this person said "hi" and he told me he was around my age.

"I thought he was real", says the girl

I put him on to my e-mail so he could chat after the chatroom.

He was trying to make friends with me, asked me how I was and acted all nice and he just wanted to be my friend.

He started sending me e-mails then that weren't nice.

He started changing his age, he said he was 15 and then it went up to 19.

And then he started sending me really personal stuff and then horrible e-mails, threatening me: 'I'm going to find you, I'm going to rape you'.

I thought he was just being stupid and I just deleted the e-mails.

He sent me about four, and I deleted them and told him I didn't want to know him or talk to him.

He was clever, little things he got from me about personal information - it's quite scary that someone is doing that Lindsell's victim

After he sent these horrible e-mails he really changed again and tried to be nice to me and asking did I want to come out.

He told me he was sick, that he had cancer, he wanted me to feel sorry for him. But I didn't believe him.

He came through as another person, he started saying "I'm Nick from near you" and he wanted to find out more about me.

One day he asked me what I was wearing, I said my school uniform. He asked me the colour and I told him and he found out from that what school I was from.

He also knew what I looked like, he had a picture of me which he must have got from my profile.

I thought I was lucky that I had worked him out, I thought he was weird. I found out from the second e-mails that he was the same person, so I stayed away and didn't contact him anymore.

He was clever, little things he got from me about personal information. It's quite scary that someone is doing that.

You have got to see proof that someone on the internet is real now.

Right at the beginning I thought he was real, but the way he talked and the way he spelt was different to my friends. Punctuation and spellings were better.

He kept saying "Can I ring you?" I said no. He said "I'm not anyone strange" and he said if my voice sounds like I'm a 40-year-old man it's because of my steroids for my cancer.

He kept trying and I was worried when I found out he knew stuff about me, I was scared. He knew what I looked like.

I don't go in chatrooms now and even if I did I would never give anyone my email address.

Don't trust people and don't give out your number or anything personal.

The mother's tale

My daughter was on the internet chatroom and got approached by someone she thought was a young boy, a teenager.

This carried on for a little while and then it started to get a bit nasty.

She did mention there was someone who was a bit funny and that she wasn't quite sure of him.

She told me he sent a few e-mails that weren't very nice.

They said things like "I'm going to be waiting for you", and "When I find you I'm going to rape you".

She decided to stop communicating with him but he kept coming through to her. She told him if he was her friend he would not send nasty e-mails.

He then played on her for sympathy. She turned around and said to him the e-mails were horrible and nasty. He replied and said he was really sorry and would never hurt her.

"I try not to think about what could have happened" says the mother

He then went for a sympathy vote and said he had cancer.

I was watching this and she was telling him not to contact her, I felt sorry for him, but my daughter was telling him she didn't want to speak to him. She is wise about it, but if I can be taken in...

She blocked him but he came through as another person and eventually she had to change her internet address and he didn't get to contact her after that.

The danger was real, my daughter was wise, she didn't give out her personal information like her address, but he did find out what school she went to, by being conniving really.

He knew where she went to school, who's to say he wouldn't have grabbed her The mother

He could have been a real threat to my daughter if he had come to her school and found her.

You think it is not going to happen to you, she is open about who she speaks to, I knew the conversations had finished.

But to find out a couple of months later how far he had gone with other girls - it was very frightening.

Thankfully he's been caught now, he'd got to a point where he had built it up and built it up and he got to some of the girls.

I haven't stopped my daughter on the internet, but she doesn't go into chatrooms now.

He knew where she went to school, who's to say he wouldn't have grabbed her as she was walking down the road, I think she was lucky, some weren't so lucky.

I try not to think about what could have happened because it is not very nice, she had a close escape.

I do trust her and I would hope she would tell me again too.