A spokesman from Wiltshire Police said: "A male walked into the offices of David Nolder and Co in St John's Street, armed with a weapon, and shot a male.
The offender drove off in a car but was arrested at approximately 3.35pm without a struggle by armed officers in Rowde.
He is now in custody at Melksham Police Station. We recovered a weapon which we believe was used in the incident."
62 year old Michael Chudley has been remanded in custody
A man remains in a life threatening condition this evening after being shot in the head at a solicitors' office in Wiltshire.