The most prolific rapist in the United Kingdom was sentenced to life in prison after being found guilty in four separate trials.

Reynhard Sinaga, 36, was found guilty of 159 counts of sexual offenses against 48 different men, according to CNN. He will spend at least 30 years in prison before he is considered for release. Law enforcement officials believe that Sinaga could have committed as many as 190 assaults.

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