A sex beast who dragged a schoolgirl into woodland has a history of disturbing violence.

Dean Lockley subjected a child to an "unimaginable" ordeal as she walked home from school along the Loop Line in Aintree.

The 30-year-old tied and gagged his victim, stripped her naked and molested her, then had the gall to claim he was "sorry".

Lockley only admitted the attack when faced with overwhelming DNA evidence and after the brave girl picked him out in an ID parade.

The cowardly dad-of-one then said he was too ashamed to attend court, because he didn't want to listen to his horrific crimes.

Now the ECHO can reveal Lockley previously threatened to stab three teenagers and to knife a dog walker in the eye and stab his pet.

Until he targeted the girl last year, Lockley didn't have any convictions for sexual offences, but his criminal record stretches back to when he was a teenager himself.

Aged 18, he threatened a 13-year-old boy and took his MP3 player, which saw him convicted of robbery and sent to a young offenders institution in 2009.

A series of sinister incidents at the age of 20 again demonstrated his predilection for exposing child victims to traumatic ordeals.

Lockley, then living in Grosvenor Street, Chester, went on a drink-fuelled rampage in the city at around 5.15pm, on October 20, 2010.

He began his two-hour tirade when he verbally abused a group of sixth form students, who were walking through Grosvenor Park.

Lockley ran at the friends shouting aggressively and grabbed hold of one of them, before a member of the public intervened.

He then approached three younger boys, aged 15, demanded drugs or money and warned: "Give it to me or I will stab all of you."

The victims tried to leave the park, but Lockley followed after them and shouted: "Give us a spliff and no one will get hurt."

Wielding a triangular piece of metal, he demanded "20 quid" and the frightened boys ended up turning out their pockets.

Bizarrely, he then returned £1 to each of his victims for their bus home and even offered to rob another passing group of youths, to make up the cost of their fares.

Lockley then armed himself with two beer bottles - which he smashed at the neck - and walked down to the canal.

There he threatened to stab a man in the eye, then, failing to get a reaction from the victim, threatened to stab his dog.

He also spat in the face of a woman who was walking toward him, before heading to a Tesco store and racially attacking a cyclist, who was securing his bike outside the shop.

Lockley was arrested and admitted drinking cider alone in the park before the attacks.

He claimed that he only targeted the cyclist because of the victim's skin colour and because he had looked at him "funnily".

When his pockets were emptied at the police station, all the thief had to show for his efforts was £4.05.

Lockley admitted three counts of robbery, one count of affray and one count of possessing an offensive weapon in public.

The yob said he was remorseful, but just as he did after the sex attack, claimed to have "very little recollection" of his actions.

As a result, Lockley was jailed for three years in February 2011, having by then turned 21.

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Liverpool Crown Court heard Lockley has since amassed a string of convictions for petty dishonesty and crimes linked to "vagrancy", during which time he has lived at addresses in Ellesmere Port, Bootle and Wallasey.

His last conviction for violence was assault causing actual bodily harm in 2018, but his sentence for that charge is not known.

At the end of last May, he smashed a wardrobe at Bosco House, a supported housing complex in Merton Road, Bootle.

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He admitted a charge of criminal damage in August and was told by magistrates to pay £300 in compensation.

They gave him until the end of September to settle the bill, which a court was told would be deducted from his benefits.

But by then he had started sleeping in woods near the Loop Line.

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And on the afternoon of September 21 last year, he committed a crime that a judge said will likely haunt his victim forever.

Lockley was jailed for 12 years, with an extended five years on licence.

This means he will spend at least two thirds of the custodial term - eight years - behind bars.

He will only be released before the end of his sentence if a parole board considers he is no longer a risk.

Lockley must also sign on the Sex Offenders Register for life.

Anyone with information or wants to report sexual offence allegation is asked to call 101 where you will be spoken to by specially trained officers or you can pass information to Crimestoppers anonymously on 0800 555 111.

Support for victims is also available through the registered charity the Rape and Sexual Abuse Support Centre Cheshire and Merseyside, who can be contacted on 01925 221 546 or 0330 363 0063 or or Rape and Sexual Assault Merseyside (RASA) on 0151 558 1801.