The motto of most police departments is, famously, "to protect and serve", and that's the basic guideline of good policing pretty much everywhere. Looking at this picture, we guess they just take it that little bit more seriously in Boston.
Shortly after the Boston marathon bombing, things were as serious as serious could get in Watertown. A "stay in place" order had been enacted, meaning residents were unable to leave their homes, and the entire town was basically in lock down. Those aren't ideal conditions to have a young child in, especially when you have nothing in the house and you can't get to the shops. That's what makes Officer John Bradley a special kind of police officer. Having become aware of a house in his watch area containing a 17 month old child, and no supplies, he went to the store for them and came back with two gallons of milk, for which he refused to accept any payment.