Sister Maryann Burgoyne is being praised by police for her quick-thinking, after giving them a good lead to help catch a thief.
Police say a man, who was caught on surveillance video, left the Rite Aid in Narberth without paying for his basket full of soap, lotion and laundry detergents.
After leaving the store, that's when Burgoyne spotted him.
She talked exclusively with NBC10's Deanna Durante and says it wasn't the man that made her suspicious, but what he was holding that caught her attention.
"I thought, that's odd, you don't walk out the store with their basket and no wrappings, so I thought 'oh dear,'" said Burgoyne.
The nun from Sister of Mercy quickly grabbed a pencil and wrote down the license plate number of the man's van.
Police say it turns out the van was stolen from Bucks County.
Investigators say the man returned to the same Rite Aid four days later, and this time he took off with a bag full of cigarette boxes without paying.
Police believe the man maybe involved in similar thefts in Philadelphia.
"I really believe that petty thieves lead into larger robberies and we have too much of that on the Main Line I think right now," said Burgoyne.
Suspect pictured below. Call Narberth Police if you recognize this man.