Hundreds of sex offenders have gone missing over three years
![Hundreds of sex offenders have gone missing over three years](https://i2-prod.walesonline.co.uk/news/uk-news/article26358589.ece/ALTERNATES/s615/0_218755944.jpg)
Figures from 21 forces show another 1,500 sex offenders changed their name after they were convicted
Figures from 21 forces show another 1,500 sex offenders changed their name after they were convicted