When the police issued the above photo-fit image last year, they received around 100 phone calls from the public.
A number of those phone calls led them to the 48-year-old man they now have in custody - someone who has spent 20 years as a police officer, acting more as a traffic officer than a criminal officer.
He left the police force in 2013 and has since gone on to work in the security industry in Switzerland.
A large number of guns and grenades have been seized from properties linked to the man since his arrest.
More top news
Paid parental leave is to be extended to working grandparents under plans announced by George Osborne.
Tickets for next year's Glastonbury Festival in Somerset have sold out in just over thirty minutes.
The Rugby Football Union has ruled out any "hasty reaction" after England were knocked out of the Rugby World Cup by Australia.