The train tracks outside Elmer Smart's home remind him of what he lost.
His wife and 2-year-old son were killed three years ago when John's stroller got caught in the train tracks.
"I didn't know how I was going to do it that year," Smart said.
Smart said he didn't know how his two little girls would be able to celebrate Christmas until state troopers stepped in with their new program "Shop With A Cop."
“It was so moving to him to have someone help him,” Pennsylvania State Trooper Stephen Limani said.
There wasn’t much money, just $50 per child, but Smart’s two children got to go on a shopping spree at Walmart.
“She enjoyed it. It was like making sure my daughter was happy and having fun,” Smart said.
Fast forward to today, and Smart is now paying it forward.
“He handed me an envelope and said, ‘Here you go. I just want to thank you for taking my kids shopping when I was at a rough point in my life,’” Limani said.
Limani said he got back to the barracks, opened the envelope and realized Smart had given Shop With A Cop $1,000.
Smart said he knows how much it will mean to other families just like his.
“It helped. It helped me out a great deal,” Smart said.