  We report on two null searches, one for the spontaneous appearance of
$\pi^+\pi^-$ pairs, another for a single $\pi^0$, consistent with the decay of
a long-lived neutral particle into hadrons and an unseen neutral particle. For
the lowest level gluon-gluino bound state, known as the $R^0$, we exclude the
decays $R^0\to \pi^+\pi^-\tilde{\gamma}$ and $R^0\to \pi^0\tilde{\gamma}$ for
the masses of $R^0$ and $\tilde{\gamma}$ in the theoretically allowed range. In
the most interesting $R^0$ mass range, $\leq 3 GeV/c^2$, we exclude $R^0$
lifetimes from $3\times 10^{-10}$ seconds to as high as $10^{-3}$ seconds,
assuming perturbative QCD production for the $R^0$.
