San Jose police said a woman arrested after she allegedly tried to sneak tainted bottles of orange juice into a refrigerator at a Starbucks had placed a "lethal quantity" of rubbing alcohol in the bottles.
A customer noticed what the woman was doing and alerted employees.
"If it weren't for the actions of that customer, I believe we'd be talking about a homicide right now," said Sgt. Jason Dwyer, a police spokesman, told the San Jose Mercury News.
A customer reported seeing the woman remove two bottles of orange juice from her purse and place them in a refrigerated display case at the store, the Mercury News reported.
After examining the bottles and detecting what they described as a “toxic smell,” store employees called 911.
Police tracked 50-year-old Ramineh Behbehanian to her home about five miles away after a witness provided her license plate number. She was arrested on suspicion of felony poisoning.