Why was my husband's killer still allowed to roam streets?

THE widow of a renowned scientist, stabbed to death by a drug-addicted psychotic, has criticised the health and legal system for allowing her husband's killer to wander the streets.
Dr Jeroen Ensink, 41, a lecturer at the London School of Hygiene and Tropical Medicine, was killed by Femi Nandap, a Nigerian-born student, on Dec 29 last year, just days after his wife, Nadja, gave birth to their daughter.

A barefoot Nandap, 23, smiled as he repeatedly knifed his victim, who was unknown to him and had been on his way to post cards to relations telling them about the birth.
Mrs Ensink-Teich, who yesterday took the couple's baby daughter, Fleur, to court to see Nandap sentenced for the killing, demanded that more be done to protect the public from those suffering from severe mental illness.
Despite attacking a police officer in May last year and then being caught in possession of two kitchen knives, Nandap was twice given bail before prosecutors decided to drop the charges against him. Six days later he attacked and killed Dr Ensink, telling police who tried to intervene that he was the "black messiah".
Outside the Old Bailey, after Nandap was given an indefinite hospital order, Mrs Ensink-Teich said there were no winners in a case such as this, but that hopefully measures would now be taken to prevent a similar tragedy happening in the future.
"This represents a failure of the health and legal system that should protect the public and care for those with severe mental illness," she said.
"I hope that following Jeroen's death, an independent investigation will take place and answers will be provided to these simple but pressing questions.
"Why was this individual granted bail after assaulting a police officer and wielding knives in public?
"How can this individual, who was mentally unwell and armed with knives, have been at liberty on the day he killed my husband? Why on Dec 23, 2015, did the Crown Prosecution Service drop the knife possession and assault charges against this individual just six days before he killed Jeroen?
"Will those who made that decision in some way be held accountable?" She added: "The lesson will not have been learned until concrete changes have been implemented."
The Old Bailey was told that Nandap developed mental health problems after he began smoking a large quantity of cannabis while studying in Boston, in the US, in 2012.
Two years later, he moved to London to study at the School of Oriental and African Studies.
But last May he was arrested in Edmonton, north London, after punching and biting a police officer. When arrested he was found with two kitchen knives. He was charged in connection with the alleged offences but was granted permission to visit Nigeria in June on condition he returned to Britain in August to attend court.
When he failed to appear, his sister, who lives in London, provided police with a letter detailing the treatment her brother had been having for his mental health conditions. After returning to the UK, Nandap appeared in court but despite having breached his original bail, was not remanded into custody. He was never prosecuted for the bail offence and the CPS later dropped the knife and assault charges due to "insufficient evidence".
The prosecution admitted at yesterday's hearing that the decision to drop the charges had been wrong. Judge Nicholas Hilliard, QC, said Dr Ensink, who had devoted his career to helping improve water sanitation for the world's poor, was a truly "remarkable man".
The judge added: "I express the hope that those in a position to do so will investigate all aspects of this case and the appropriate lessons will be learned."
Femi Nandap Wealthy home
Born into a wealthy family in Nigeria, Femi Nandap had a privileged childhood and a promising future.
After excelling at school, he travelled to the US to study in Boston. But he began to smoke cannabis and after suffering a series of mental health problems dropped out of his course.
He moved to London, where his older sister lived, to study at the School of Oriental and African Studies and continued to smoke cannabis. A doctor at Broadmoor said there was a history of mental illness in Nandap's family, adding: "The cannabis triggered a psychotic illness."
Dr Jeroen Ensink New father who helped world's poor
Dr Jeroen Ensink moved from the Netherlands in 2008 to become a lecturer in public health at the London School of Hygiene and Tropical Medicine.
An expert in sanitation and water management, he had worked in developing countries, including on a project to tackle cholera.
His wife, Nadja, said: "Jeroen worked so hard to make this world a better place for the less fortunate among us."
One of his colleagues, Sandy Cairncross, said: "He was killed in his prime and just as he was getting his own research projects under way, with potential benefits to millions of people."
Dr Ensink was killed outside his home in North London 10 days after Nadja had given birth to their first child, Fleur, while on his way to postcards to relations.
Student to killer Path to the attack
2012 Femi Nandap moves from Nigeria to the US to study; he begins to smoke large amounts of cannabis. 2014 Nandap wins a place at London's School of Oriental and African Studies and moves to Britain. May 22 2015 He is arrested on suspicion of possessing kitchen knives and biting a police officer in north London. June 2015 Despite being on bail, Nandap is granted permission to visit Nigeria on condition he returns to court in August. August 2015 Nandap fails to answer bail. October 12 2015 Nandap appears in court but is again freed. December 23 2015 Charges against him dropped. December 29 2015 Nandap fatally stabs Dr Jeroen Ensink.
©The Telegraph