A US singer has reportedly ended a relationship with a Scottish football fan she met during the Tartan Army's takeover of Boston for a World Cup fixture, after he became the subject of a "serious crime" investigation. The romance had drawn attention as a rare human-interest story amid the wider coverage of Scotland's travelling support descending on the US city, but has now come to an abrupt end.

Details of the specific allegations against the fan, and the nature of the "serious crime" investigation, were not included in the available article text, which consisted largely of unrelated Daily Mail headlines rather than the full story. As such, further specifics of the case, the identities of those involved, and any official comment from investigators could not be confirmed from the supplied content.