However the jobless migrant was left to roam the streets of the UK once again when the deportation order was quashed in 2013 after he appealed it on human rights grounds.
Just three weeks after Waise, who arrived in the UK at the age of 10, was released on licence he struck again, approaching children aged 11 to 14 and kidnapped one as they walked to school in Hornsey, north London.
Prosecutor Edward Franklin said: “On the morning of January 18 this year the prosecution case is that Mr Waise approached a number of children as they made their way to school.
Waise is captured approaching a schoolgirl
If he had been deported then all of those children would not have gone through their unfortunate experiences
“Fortunately those children got away and many of them continued to school where they reported the incidents, others told their parents.”
At Wood Green Crown Court, a jury of five women and eight men found Waise guilty of one charge of supply class B drugs, one count of kidnap and four counts of attempted kidnap.
Judge Witold Pawlak said: “If he had been deported then all of those children would not have gone through their unfortunate experiences.”
Waise began his crime-spree by offering a 10-year-old boy cannabis.
Mr Franklin added: “Mr Waise asked him if he wanted £10 and cannabis. He said he didn’t and kept walking, but the defendant kept trying to keep up with him and said he could manipulate children into giving them weed and that he would give him weed.
The defendant posed as a policeman in an attempt to lure the schoolchildren
“Mr Waise asked ‘what school do you go to?’ But the boy lied and said he went to secondary school because he didn’t want him knowing what school he went to.”
Later, Waise went on to kidnap a 11-year-old schoolgirl after posing as a police officer.
Mr Franklin said: “At first she thought he was a friendly stranger. He said he saw her mother drop her off and that her mother had texted him asking him to give her breakfast.
“He put his arm around her and said he was a police officer and she should come to his house for breakfast and to look at some photos about an incident in connection with a young girl and that her mother would be present.
“The girl knew a real police officer wouldn’t ask that and she pretended a group across the road were her friends.
“As she started to walk away he grabbed her bag and coat and said he wasn’t going to hurt her. She managed to run away and lose herself in the crowd.
Waise attempted to kidnap a 11-year-old
“This is not a case of trying to get anybody into a van, but he did attempt to take someone against their will or carry them off through force or fraud, and that is the definition of kidnap.”
The court heard how Waise approached a group of five boys outside a chicken shop and said he would give them £20 each.
The defendant then produced a substance in a bottle and informed them if you give it to girls you can do what you want to them.
Mr Franklin added: “He then waved it under their noses and they ran away from him.”
Waise had just been released after serving six years of an eight year sentence he had been given in 2009 for raping a 21 year old woman he had followed, strangling her until she was unconscious before raping her when she came round.
He was arrested on January 20, when he was found with two bottles of poppers, which the prosecution say were similar to those shown to the boys.
Wearing a grey t-shirt and jeans, Waise held his hands together and dropped his head as each guilty charge was read out.
He claimed he was lost in the area and it was a case of mistaken identity.
His mother and two other family members stood in the public gallery.
Another attempted kidnap charge relating to a 15-year-old schoolgirl was put on file after the jury was unable to reach a majority verdict.
Adjourning his sentencing until next week, Judge Pawlak read out a string of previous convictions including robbery, theft and possession of cannabis.
Judge Pawlak added: “My own inclination is that he is dangerous. I think I’m in a better position than a probation officer to decide that.”