  We present a new and sensitive method to observe direct CP violation in $D$
mesons using Bose symmetry and Dalitz plot. We apply the method to processes
such as $B \to D^0\bar{D}^0 P$, where $P$ is either a $K$ or a $\pi$. By
choosing to reconstruct $D$ mesons only through their decays into CP
eigenstates, we show that any asymmetry in the Dalitz plot can arise only
through direct CP violation. We further show how CP violation parameters can be
determined. Since the approach involves only Bose symmetry, the method is
applicable to any multi-body process that involves $D^0\bar{D}^0$ in the final
state. We briefly discuss how $B\to D^* \bar{D}^* P$ can also be used in a
similar way.
