Immigration New Zealand (INZ) will probe Czech drug lord Karel Sroubek's Kiwi residency application.
The investigation will be focused on allegations that his ex-wife no longer supports his application, and that he has already been back to the Czech Republic.
Immigration Minister Iain Lees-Galloway spoke in Parliament on Wednesday, stating that he had just come across information that "directly contradicted" the information he'd based his decisions off up until that point.
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"I am now taking advice on my options and need to consider the veracity of the new information that has been made available to me," he told the House at the time.
Drug smuggler Sroubek came to New Zealand in 2003 on a false passport, and told officials that he had to flee his country after witnessing a murder.
He soon became affiliated with Hell's Angels in New Zealand, and was imprisoned for importing drugs, among other charges.
He was jailed in June 2016 for five years and nine months after a jury found him guilty of bringing Class-B MDMA powder into the country. He was refused parole in September.
Newshub.