The UK is said to be taking steps to get actor Kevin Spacey extradited from the U.S. to face sexual assault charges, unless he came back voluntarily.

The Guardian reports that the Crown Prosecution Service (CPS) announced last week that it had authorized four charges of sexual assault against the actor in respect of attacks against three males between 2005 and 2013, following an investigation by the Metropolitan police. U.S. police may soon be asked to find Spacey and detain him on the UK’s behalf.

Partner and Head of Business Crime, and a former CPS head of extradition, Nick Vamos was quoted in The Guardian about the process the CPS would take in seeking such an extradition.

Among others, Nick explained what steps officials would follow, any potential timings, the pros and cons of being formally extradited from the U.S. versus simply flying back to the UK voluntarily, what a return by the actor would mean and whether he would have to remain in the country.