A lab technician is missing from Yale University, where a graduate student was found slain three months ago.

John DiNello hasn’t shown up for work in four days and hasn’t been seen at his West Haven home in three days, university spokesman Tom Conroy said last night.

Police are treating the case as a missing person, not a criminal investigation, said West Haven police Sgt. Martin Garcia, adding the case is unrelated to that of slain student Annie Le.