Devon and Cornwall Police said in a statement that "the suspect, who is a white British citizen, is in police custody."
There is no indication that the murder was politically motivated, police said on Sunday, according to The Guardian. Police are not looking for any additional suspects.
Widdecombe, 78, was found dead at her home in southwest England on Thursday. Her body had suffered severe injuries, according to the BBC.
On Saturday, suspicions against another man who had previously been arrested were dropped.
Widdecombe was a Conservative minister at the Home Office and the Department of Employment and Social Affairs from 1994 to 1997 under Prime Minister John Major. In 2019, she became a Member of the European Parliament for the Brexit Party, later renamed Reform UK.
