Police have wanted to speak to Mr Griffin since Ms Legg was found dead
A Cheshire businessman is being held by police after his girlfriend's body was found at a luxury hotel in Paris.
Detectives are continuing to hold 39-year-old Ian Griffin over the murder of Kinga Legg, who was found battered to death at an exclusive Paris hotel.
The 36-year-old's body was found at the Hotel Le Bristol a week ago.
Mr Griffin was arrested at 1530 BST in woodland in Macclesfield, Cheshire, where he had been sleeping rough on Monday, police said.
A spokesman for Cheshire Police confirmed the man was arrested under Section Nine of the Offences Against the Person Act 1861.
The section of the act covers any murder or manslaughter committed outside of the UK.
"At this stage it would appear that the man has been living rough in a tent," a spokeswoman added.
"Cheshire Police are liaising with the French authorities."
Polish-born Ms Legg had lived in Knutsford and had businesses listed in Cheshire. She had also previously lived in Lancashire.
She owned international company Vegex, which supplied Tesco and other supermarkets with tomatoes. The company has a site in Oxshott, Surrey and Opatówek, Poland.
Her body was found by a cleaner last Tuesday and French police have confirmed she had died from "internal bleeding caused by multiple blows".
Mr Griffin and Ms Legg had checked into the £1,000-a-night Hotel Le Bristol the day before.
Following the discovery of Ms Legg's body, an international manhunt for Mr Griffin began.
His Porsche was discovered in Warrington a few days later, officers conducted tests on it and there had been several sightings of him in Surrey.
Two plain-clothes officers from Cheshire Police were stationed outside his parents' home in Delph Lane, Winwick, on Friday.
Police said they were not looking for anyone else in connection to the murder of Ms Legg.