Following a three-year joint investigation by Dumfries and Galloway Constabulary and the US Federal Bureau of Investigation (FBI), arrest warrants were issued for two Libyan nationals in November 1991.
Tras tres anos de investigación entra a policía de Dumfries e Galloway e o FBI, en novembro de 1991 emitíronse orde de arresto contra dous cidadáns libios.