  The recent results at RHIC for direct $\gamma$-charged hadron azimuthal
correlations in heavy-ion collisions are presented. We use these correlations
to study the color charge density of the medium through the medium-induced
modification of high-p$_T$ parton fragmentation. Azimuthal correlations of
direct photons at high transverse energy (8 $<$ E$_T$ $<$ 16 GeV) with
away-side charged hadrons of transverse momentum (3 $<$ p$_T$ $<$ 6 GeV/c) have
been measured over a broad range of centrality for $Au+Au$ collisions and $p+p$
collisions at $\sqrt{s_{NN}}$ = 200 GeV in the STAR experiment. A transverse
shower shape analysis in the STAR Barrel Electromagnetic Calorimeter Shower
Maximum Detector is used to discriminate between the direct photons and photons
from the decays of high-p$_T$ $\pi^{0}$. The per-trigger away-side yield of
direct $\gamma$ is smaller than from $\pi^{0}$ triggers in the same centrality
class. Within the current uncertainty the recoil suppression in central $Au+Au$
collisions I$_{CP}$ of direct $\gamma$ and $\pi^{0}$ are similar.
