(NEWSER) - If Ray Clark did, as police apparently suspect, kill Annie Le, investigators have an odd theory about his motivation, the New York Daily News reports. In emails that caught their attention, the Yale lab technician scolded Le about her lax handling of mice in the lab. Le apologized, but investigators wonder if resentment over the issue may have turned Clark into a killer. A co-worker described him to the New York Times as "very officious and very demanding" over minor issues and said he often gave grad students a difficult time. More»