  We prove the following result in relative representation theory of a
reductive p-adic group $G$:
  Let $U$ be the unipotent radical of a minimal parabolic subgroup of $G$, and
let $\psi$ be an arbitrary smooth character of $U$. Let $S \subset Irr(G)$ be a
Zariski dense collection of irreducible representations of $G$. Then the span
of the Bessel distributions $B_{\pi}$ attached to representations $\pi$ from
$S$ is dense in the space $\mathcal S^*(G)^{U\times U,\psi \times \psi}$ of all
$(U\times U,\psi \times \psi)$-equivariant distributions on $G.$
  We base our proof on the following results:
  1. The category of smooth representations $\mathcal M(G)$ is Cohen-Macaulay.
  2. The module $ind_U^G(\psi)$ is a projective module.
