But it is fair to say, no police officer expects that trouble to be related to the complexities of a 10-year-old's maths homework.
Yet when faced with just such an issue, one brave officer in Marion, Ohio, stepped up to the mark.
Lena Draper decided to use Facebook to get in touch with her local police force, sending them an appeal for help at the weekend.
"I am having trouble with my homework. Could you help me?" she asked.
"What's up?" asked officer BJ Gruber, who told the BBC he was hoping "for something in the realm of history".