  We report measurements of jet quenching in $Au+Au$ collisions at
$\sqrt{s_{NN}}$=200 GeV, based on the semi-inclusive distribution of
reconstructed charged particle jets recoiling from a high $p_T$ hadron trigger.
Jets are reconstructed with the anti-k$_T$ algorithm ($R$=0.2 to 0.5), with low
IR-cutoff of track constituents ($p_{T}>0.2$ GeV/c). Uncorrelated background is
corrected using a novel mixed-event technique, with no fragmentation bias
imposed by the correction procedure on the accepted recoil jet population.
Corrected recoil jet distributions, reported in the range $0<p_{T,jet}^{ch}<30$
GeV/c, are used to measure jet yield suppression, jet energy loss, and
intra-jet broadening. The first search for QCD Moli\`ere scattering of jets in
hot QCD matter at RHIC is reported.
