Chicago police are searching for a Northwestern University professor and an Oxford University administrative worker suspected of stabbing a man to death on the city’s Near North Side. The pair, identified as Wyndham Lathem of Northwestern and Andrew Warren, a senior treasury assistant at Oxford University, have been described as armed and dangerous. They are accused of fatally stabbing 26-year-old Trenton Cornell-Duranleau last week; no details have been released on a possible motive. It was not immediately clear how Warren and Lathem knew Cornell-Duranleau, who a medical examiner said died of “multiple sharp force injuries.” Police said Wednesday they were intensifying their search after a Cook County judge issued an arrest warrant. Both Northwestern University and Oxford University have promised to cooperate with investigators, and Lathem—an associate professor at Feinberg School of Medicine—has been banned from all Northwestern campuses and placed on leave.