THE PARTY UNDER the overpass was in full swing when Case arrived. At least fifty kids, she estimated, running her eyes over the crowd. Most stood scattered in clumps along the walking path flanking this side of the Humber River. Others sat on the concrete slope running up to the underside of Lakeshore Boulevard above them. Here, just above its mouth, the river was about thirty meters wide. On the opposite bank, a wider paved path ran north from the lake following the river for several kilometers. Joggers, walkers, and cyclists filled that side. A very non-street-kid crowd. But on this side, the path was narrow, turning to a dirt trail north of the underpass that wound through thick brush. Popular in the daytime with birdwatchers and naturalists, but usually empty in the evenings. Plus, i

