This reminds me of some years ago near Gede town in Kilifi county. I was stopped by KDF guys at a roadblock. After checking the car and not finding any faults, the asked me, “Mama si utupatie chai?” Told them naenda hapa karibu na nitawaletea chai. Went bought a Thermos flash and plastic cups, got in a kiosk and bought tea and mahamri. I could see their smiling faces when I pulled my car and gave them the flask. What they said was later relayed to me by the person I was driving with. He had gone to take the flask. You can imagine what they told the guy!
By the way it's true, most luo drivers won't give handouts to police that easily, my dad used to drive around with tea in the back for "kachai" ya polisi