Nicola Sturgeon claimed she was unaware of the police’s preparations to detain her husband Peter Murrell.
Following his detention this morning, her spouse was later reported by police to have been freed “without charge.”
After his arrest at 7:45 am, he was questioned by investigators from Police Scotland.
At 6:57 PM, the police let him go.
In connection with the inquiry, officers also conducted searches today at a number of homes.
Police said a report will be sent to the Crown Office and Procurator Fiscal Service.
A spokesperson for the former Scottish first minister said: ‘It would not be appropriate to comment on a live police investigation.
‘Nicola Sturgeon had no prior knowledge of Police Scotland’s action or intentions.
‘Ms Sturgeon will fully cooperate with Police Scotland if required however at this time no such request has been made.’
Police Scotland has been investigating the spending of about £600,000 which was intended for Scottish independence campaigning.
It is understood there have been complaints the cash has been used improperly by being spent elsewhere.
A spokesperson earlier said: ‘A 58-year-old man has today, Wednesday, 5 April 2023, been arrested as a suspect with the ongoing investigation into the funding and finances of the Scottish National Party.
‘The man is in custody and is being questioned by Police Scotland detectives.
‘Officers are also carrying out searches at a number of addresses as part of the investigation.