extortionist

基本解釋

In several cases, police and courts have demanded that the helper prove his or her innocence, while the extortionist has not needed to produce evidence.
在之前的許多案例中，警方與法院都要求救助人提供證據(jù)以證明他/他的清白，而勒索人（被救助人）則不需舉證。

There was some margin to overcome the folly of a diplomatic deal that helped North Korea's malign and extortionist regime survive.
FORBES: Freedom's Edge
That was the name used on ransom demands made by an extortionist who in 1984 poisoned the sweets made by two Japanese confectionery firms.
ECONOMIST: The crazies and their poison
And the 1994 deal did its part to encourage Mr Kim in his extortionist habit of acting up and then pocketing placatory goodies, time and again.
ECONOMIST: Dealing with North Korea

An extortionist is a person who commits the crime of obtaining something from someone by using force or threats.