The bike was not locked, sitting on our back porch, inside the gated area in our backyard. A man walked up the driveway, looking at my neighbor's house, then our yard (we share a driveway). The neighbor was awake and in his kitchen, so the man left when he saw movement. Neighbor left a few minutes later in his truck, then the guy came back and opened our gate, got the bike, and rode it away. We gave video and images to PD.