Four people who abducted, tortured and sexually assaulted a teenage girl during a 16-hour ordeal  have been jailed.  

David Appiah, 21, of New Road, Chingford, was part of a gang who filmed the 14-year-old victim's harrowing ordeal after she was approached while walking to school.   

She was subjected to "acts of degradation" after being confronted by Caylen Candy, 18, and Chyanne Powell, 18, near Theobolds Grove Station in Waltham Cross on September 14.  

Both Candy and Powell, who were 17 at the time and had spent the night drinking, did not know the schoolgirl when they asked for money. 

They kidnapped her and took her to Powell's flat in High Street, Waltham Cross, where she endured what police described as "cowardly and malicious acts of violence". 

Once at Powell's flat, the girl was forced to strip and touch herself, bits of her hair were chopped off, a knife was held to her throat and she was made to shave off her pubic hair.  

Appiah, a friend of Powell's, arrived at the flat after being sent images of the girl. 

He instructed Powell to tell her to take her clothes off again so he could see her naked. 

They also sent films to Sanjay Kalia, 18, of Macoma Road, Plumstead, who encouraged them to do other things to the victim.  

The girl was forced to sit in a freezing cold bath and her head was forced under water for 10 seconds on three separate occasions.  

Her body was written over and salt poured down her throat.  

She was later found by her family and police at Theobalds Grove Station after being dropped off by Powell at around midnight.

Prosecutor Michael Speak, said: "For almost a full day this young girl was subjected to acts of degradation and violence you will find hard to comprehend.   

"It began like a street robbery, with Candy and Powell trying to rob her of what she had." 

"They said 'why don't you get undressed?' They asked about her bra size and forced her to take off her clothes after they pointed the knife at her throat.  

"They began to film the proceedings.  

"They forced her to shave her pubic region and made fun of her saying 'You are disgusting'".  

Asked why they carried out the attack, they told the court it was "a bit of fun". 

During the trial, Appiah told the jury he thought the girl was the same age as Powell and Candy and was their friend. 

Before Appiah arrived, he described the girl as a "worm" in a series of Blackberry messages. 

Her disappearance triggered a large-scale police search. 

A passing motorist took a chance photograph of the abduction taking place which was later used in media appeals. 

Hertfordshire Police paid tribute to the victim's bravery. 

Detective Constable Ian Minnis, said: "Without doubt this was a totally unprovoked incident involving a victim who was just in the wrong place at the wrong time. 

"Throughout her time in the hands of these wicked women she showed huge courage and fortitude. I’m sure there were times that she feared for her life. 

"The sentences reflect the horror of what our victim endured and I hope they mark a turning point in her recovery from what would have been a terrifying ordeal. 

"She is a tremendous young woman, who in the case of Appiah had to go into the witness box and re-live her ordeal. 

"She did so with great dignity and following the sentencing result I hope she can start to move on with her life." 

Appiah was sentenced to eight and a half years in jail at St Albans Crown Court on Friday (May 15) after being convicted of false imprisonment and causing a child to engage in sexual activity. 

Powell was jailed for seven and a half years in a youth offenders institute. 

Candy was sentenced to six years and three months and Kalia five years and six months.