The widow and successor of the Unification Church founder Sun Myung Moon was arrested ​on Tuesday on charges of providing illegal political funds and bribing the wife of Yoon Suk Yeol, who was impeached and ousted as president of South Korea. Han Hak-ja, 82, ​was being held in a jail south of Seoul after a court in the capital city issued a warrant for her arrest​ early Tuesday​. The court expressed concern that if she remained free she could try to destroy criminal evidence against her. Ms. Han, known as “​True ​Mother​” among her followers​ in South Korea and abroad, has been leading the Unification Church since ​the Rev. She and her church​ have not drawn much public attention in South Korea, a country with no shortage of politically influential or scandalous religious leaders.​But Ms. Han and ​the Unification Church suddenly made headlines this year in connection with criminal investigations targeting Mr. Yoon’s wife, Kim Keon Hee​.