Prosecutors have requested an arrest warrant for Samsung Group heir Lee Jae-yong and two of his key aides in their investigation of the controversial 2015 merger between two Samsung affiliates Samsung C&T and Cheil Industries that cemented his control over the group.
The prosecution's move comes just two days after Lee requested an outside review of the investigation and possible indictment based on reforms to the prosecution that were introduced in 2018.
The de facto chair of South Korea's largest conglomerate is also suspected of an accounting fraud at Cheil affiliate Samsung BioLogics with links to unfair trade and violation of external audits.
Lee was questioned twice last week and is said to have denied the allegations.
The hearing for the case will be held on Monday to decide whether to issue arrest warrants.
And that decision will likely be out late at night or early Tuesday.