Maybe Ruckman found out and was 'suicided'?
Prof. Peter Ruckman,
http://www.nydailynews.com/news/national/professor-sons-found-dead-home-apparent-murder-suicide-article-1.3854857
http://www.pardonpower.com/2009/12/
Obama holds the record for the largest single-day use of the clemency power, granting 330 commutations on January 19, 2017, his last full day in office.[5][6] He also has issued more commutations than the past thirteen presidents combined.[2][7]
https://en.wikipedia.org/wiki/List_of_people_granted_executive_clemency_by_Barack_Obama