The French president's doubts come as the UK government is set to publish its demands.
More than 100 UK nationals end their two-week period in Milton Keynes as 30 others begin their isolation.
The family's demand comes after the US refused to extradite the suspect involved in Mr Dunn's death.
Tyson Fury wins the WBC world heavyweight title after producing a sensational performance against Deontay Wilder.
Wintry showers are expected in the central Scotland, Grampian, Highlands and Argyll and Bute regions.