The suspect, tracked down from surveillance video, claims to have had a medical emergency

An apparently sports-mad parent from a Michigan high school has stunned authorities and triggered a police investigation after allegedly entering a rival school and defecating in a corridor.

The bizarre case unfolded at the Grosse Pointe South school with the parent a fan of fierce local rival Bedford high school. The two schools were engaged in a district championship football game on Friday, the Detroit TV news outlet WXYZ reported.