It's disturbing to read.
I cannot imagine the hell that Milly's parents have been through, on top of the disappearance and murder of their daughter, they have been harrassed, lied to and let down by the police and prison services. The police spent some time investigating Milly's father as a suspect, slowing down the investigation. And the News of the World hacked them too.
Just read this on Wikipedia:
Paul Hughes was convicted of making threats to kill and was jailed for five years after sending letters to Dowler's mother threatening to kill her and claiming to have killed Dowler. The letters were sent whilst Hughes was in prison for indecently assaulting a twelve-year-old girl; the prison service apologised for not screening mail effectively.
Lianne Newman, of Tewkesbury, Gloucestershire, repeatedly phoned Dowler's parents, school and the police, pretending to be Dowler. Newman was jailed in April 2003 for five months after pleading guilty to five counts of making phone calls to cause annoyance, inconvenience or needless anxiety.
Gary Farr, of Retford, Nottinghamshire, repeatedly e-mailed Dowler's parents, school friends and police officers working on the case, claiming that Dowler had been smuggled out of the country to work as a prostitute and stripper at nightclubs in Poland, and that her death had been a cover-up. Farr was sectioned indefinitely under the Mental Health Act on 19 October 2006 for being a serious psychological danger to the public after admitting a charge of harassment.
And now nearly 14 years later they have this, the murderer bragging about more horrific details of what happened to their daughter.