1/0 = Inf. If there had been one murder in the previous year and two this year, that would be a 100% increase. I do not think my town has ever had a recorded murder. The town next door, similar in demographics, had its last murder over 25 years ago, when some guy was having an affair with a woman in his church’s choir. When she broke it off, her lover killed her husband.
I guess you’ll have to take that headline writer to Math Court.