Former boxing champion and Olympic gymnast has been arrested last week after her husband was found bludgeoned to death inside their apartment in Switzerland.

34-year-old Viviane Obenauf is suspected of clobbering her 61-year-old husband, who was a well-known proprietor in the Swiss town of Interlaken.

The victim, who was identified only as Thomas, died of “massive injuries” from a “sustained violent assault” in an attack.

“He was easy to get along with and worked with passion,” said Martin Soche, a friend of Thomas and one of the last people to see him alive.

“I had borrowed glasses from him for a birthday party and had to bring them back. Then we had another beer together. And now he’s just not there anymore. It has shaken everyone up.”

Obenauf, who once represented her native Brazil in the Olympics as a gymnast and fought in three world title bouts during her career, retired with a record of 14-6 (9KOs) last year.

She and Thomas had married in January 25 and opened a gym in the Swiss town of Interlaken, where she lived with her husband.

The former featherweight had been arrested in London in 2016 when she punched a man in the face after trying to grope her bottom while she was celebrating her 30th birthday.

A bodybuilder, who wished to be unnamed, said he’d previously dated the fighter and wasn’t surprised his ex was back behind bars.

“She always had two faces. It’s like flicking a switch,” he claimed.

“She hit me directly in the face three or four times with her fist. I gave her a slap in the face to bring her down. Then she slowly calmed down and went to sleep,” he added.

Obenauf had been taken into custody three weeks after the incident and held without charge.