It’s a story that’s sure to leave heads spinning: Wednesday morning, CNN reported that Mother Teresa was the subject of an exorcism during her later years. According to the report, Henry D’Souza, the Archbishop of Calcutta, observed the late nun in an "extremely agitated" state while she was hospitalized for cardiac problems. She would appear perfectly placid during the day, then toss and turn at night, pulling off the monitoring wires that were attached to her arms.

D’Souza diagnosed Mother Teresa as possessed by the devil. The solution? To have the rite of exorcism performed. The nun reportedly agreed, and the Archbishop called in a "holy man" who commanded the evil spirits to leave the elderly woman’s body. After the exorcism, D’Souza says, Mother Teresa "slept like a baby."

Why would Satan choose to possess one of the 20th century’s most pious and best-loved figures? Was an actual exorcism actually performed over Mother Teresa’s bed? Does this story hurt the nun’s bid for sainthood? In hopes of finding some answers, TIME.com spoke with Michael W. Cuneo, a professor of sociology and anthropology at Fordham University and author of the new book "American Exorcism: Expelling Demons in the Land of Plenty."

TIME.com: If you believe this story, it seems that this exorcism was ordered in pretty hurried circumstances. Isn’t there a specific set of conditions that need to be met before anyone conducts an exorcism?

Michael CuneoIn theory, yes. That’s the way it’s supposed to go.

The official Roman Catholic position is that you’re supposed to approach an exorcism with a great deal of skepticism. Before ordering an exorcism, a priest is required to conduct a thorough review, eliminate every other possibility for the subject’s behavior — including psychopathologic and organic disorders. Even once you’ve ruled this out, you rule it out again. One of the weirdest things about this story, if the article is correct, is that there was no evaluation on the part of the Archbishop. The order for the exorcism was just off the cuff. Our biggest handicap in analyzing this story, of course, is that we don’t know how trustworthy the article and its sources are. So we have to approach all of this with some skepticism.

Let’s assume this is a true account, and Mother Teresa was in fact the subject of an exorcism. Does this obstruct Mother Teresa’s path to sainthood?

I can’t imagine this would hurt or prejudice the campaign to have Mother Teresa declared a saint. If anything, the report will enhance her stature. Her advocates and defenders will say this is all the more proof of her piety — after all, Satan and his minions are often eager to attack the truly holy.

Beyond that, there is also a tradition here. According to Roman Catholic lore, holy men and women are often tested somewhere down the line. For example, Jesus Christ was supposedly assailed by demons during his earthly ministry.

Is it possible that this so-called "exorcism" was actually part of another rite, like a prayer for the sick?

That’s what I initially thought when I read this story, because there is a prayer called the rite of deliverance that is a kind of informal exorcism, and is often performed at baptisms and over the bed of the dying. But if you take the story at face value, the phraseology that D’Souza uses, like "in the name of the church, I command you," seems to indicate this was a fairly formal procedure. But again, we don’t know exactly what happened — we have to take D’Souza’s word for it.