NYC Police Officer's Chivalrous Act Towards Homeless Man

And finally tonight, the story behind a photograph that made its way around the world today. Showing something small, but infini infinite. The power of one random act of kindness. Abc's dan harris and... See More

And finally tonight, the story behind a photograph that made its way around the world today. Showing something small, but infini infinite. The power of one random act of kindness. Abc's dan harris and the polpoliceman and the man who had no shoes. Reporter: A new york city police officer on a frigid november night in times square bending down to give a homeless and shoeless man a pair of brand new boots. This scene would have gone unnoticed, except jennifer foster, a tourist, just happened to be there. I heard him say, I have these size 12 all weather boots for you, let's take care of you. Reporter: She snapped this picture and sent it to the nypd the department posted it to facebook two days ago, and tonight, it has almost 2 million views, 400,000 likes and more than 28,000 comments. It's also been passed around the globe from romania to russia to china. And, today, the officer himself came forward. He is lawrence deprimo, a police 25-year-old, who still lives with his mom and dad. I knew right then I needed to help him. Reporter: When you presented him with the boots, what was his reaction? He couldn't believe it, he was like, this is too much, god bless you and be safe and everything like it was almost like you gave him a million dollars. Reporter: The officer doesn't know anything about the man he helped or what's become of him, but he keeps the receipt for the $75 he spent on those boots in his bulletproof vest. A reminder for all of us about the pervasiveness of need and the potential for compassion. Dan harris, abc news, new york.