  We give an elementary proof of a weighted resolvent estimate for
semiclassical Schr\"odinger operators in dimension $n \ge 1$. We require the
potential belong to $L^\infty(\mathbb{R}^n)$ and have compact support, but do
not require that it have derivatives in $L^\infty(\mathbb{R}^n)$. The weighted
resolvent norm is bounded by $e^{Ch^{-4/3}\log(h^{-1})}$, where $h$ is the
semiclassical parameter.
