Mystery P.I. Portrait of a Thief is a single player puzzle game for Nintendo DS and DSi which mixes classic seek and find puzzle play with an engrossing crime theme in which players are task... Read allMystery P.I. Portrait of a Thief is a single player puzzle game for Nintendo DS and DSi which mixes classic seek and find puzzle play with an engrossing crime theme in which players are tasked with exposing an artful thief.Mystery P.I. Portrait of a Thief is a single player puzzle game for Nintendo DS and DSi which mixes classic seek and find puzzle play with an engrossing crime theme in which players are tasked with exposing an artful thief.