A researcher at the Mayo Clinic has been charged with making terrorist threats against his estranged wife, with a chemical weapon he apparently obtained at the clinic: Mayo Clinic Researcher Under Federal Investigation.

ROCHESTER, MN — A Mayo Clinic researcher is under federal investigation tonight, for possibly trying to use a chemical weapon.

The F.B.I.’s concern is over that researcher’s possession of potassium cyanide and what he intended to do with it.

Doctor Sreekumar Raghavakaimal has been charged by Rochester authorities with making terroristic threats against his estranged wife. According to a complaint, In early February he threatened to cut his 11-year old son’s throat with a butcher knife. After apologizing he talked of suicide and left with a pill bottle.

An F.B.I. affidavit says olive oil was found in that pill bottle and another bottle containing potassium cyanide was given to police by Raghavakaimal.

Julie Germann, the Olmsted Assistant County Attorney says, “We did realize that it wasn’t the household chemical that should be found in someone’s house. We did take all precautions that are required as far as double-bagging it contacting the hazmat team.”

According to the F.B.I. the combination of olive oil and cyanide is mentioned in the Mujaheddin poisons handbook as a way to make cyanide more toxic to touch.