Chicago (CBS) — Earlier this month, the Chicago Police Department gave a single mother of four tickets to the White Sox home opener as part of “Operation: Pay It Forward,” and challenged the DC Police Department to do a similar act of kindness. On Wednesday, the DC Police Department posted a video of two of its officers buying groceries for a mother last Friday.

“I need officers like y’all all the time,” the woman in the video says when the officers ask to buy her groceries.

The Los Angeles Police Department launched “Operation: Pay It Forward” in March after someone bought lunch for two LAPD officers. The department then nominated the New York Police Department, who passed it on to CPD.

The DC Police Department passed the challenge on to the Boston Police Department.