European Arrest Warrant
Biometrics commissioner "deeply concerned" as Lib Dem Layla Moran tells HuffPost UK leaving pacts "will make Britain less safe".
It could be the first step to have him extradited from Britain.
She was found in a shallow grave after going missing.
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There is a serious risk that crucial aspects of security cooperation could end after Brexit - putting public safety at risk
He has been there for more than five years.
WikiLeaks founder has hidden from extradition and bail arrest warrant since 2012.
Prosecutors were unavailable for comment over the claims.