Dr. Yoshiki Sasai, former Deputy Director of the RIKEN CDB and a senior author on the STAP papers, has reportedly died from suicide.
Update: The Japan Times writes on this situation that Sasai was found hanging at RIKEN and there may have been a suicide note.
Dr. Sasai was a top scholar in the stem cell field. He published dozens of high-impact publications and was widely respected.
The Sasai lab has focused on many important stem cell and developmental biology projects.
This is a tragedy and thoughts go out to his family, friends, and lab members.