Brennan Walker, 14, of Rochester Hills, Mich., woke up around 7:30 a.m. on Thursday — too late. He had slept through his alarm and was going to miss the school bus.

So he decided to walk to Rochester High School, where he is a freshman. That takes about an hour and a half, but he thought he would at least make it in time for his third-period class in world studies, his favorite subject.

Brennan did not have his smartphone that morning, and so, lacking assistance from GPS, he tried to follow the route his bus usually takes. He ended up in a quiet subdivision where the roads looped into each other, and when he noticed he had gone in a circle, he stopped to ask for help.

He tried one home, and then another. A woman answered the door, he said, and began yelling almost immediately, as if he were trying to break into her house.