Northwestern University professor Wyndham Lathem, 42, (left) was denied security clearance to work in France just six months before he became a suspect in a brutal Chicago stabbing. The microbiologist is accused of stabbing to death Trenton Cornell-Duranleau, 26, (inset) in his Chicago apartment on July 27. Lathem and fellow suspect Andrew Warren, (right) a 56-year-old Oxford finance worker, were both arrested on Friday in California after going on the run. Original Article: http://www.dailymail.co.uk/news/artic... Original Video: http://www.dailymail.co.uk/video/news... Daily Mail Facebook: / dailymail Daily Mail IG: / dailymail Daily Mail Snap: / 8392137033 Daily Mail Twitter: / mailonline Daily Mail Pinterest: http://pinterest.co.uk/dailymail Daily Mail Google+: https://plus.google.com/+DailyMail/posts Get the free Daily Mail mobile app: http://dailymail.co.uk/mobile