  The unidentified, low-latitude, $\gamma$-ray source 3EG J1828+0142 presents
high levels of variability and a steep spectral index $\Gamma\sim2.7$. Here we
propose a model for this source where the high-energy emission is produced by a
galactic Kerr-Newman black hole. The model takes into account electron-positron
annihilation losses in the calculation of the expected spectral energy
distribution and can reproduce the observational features, including the
absence of a strong radio counterpart. We also report the discovery of a nearby
supernova remnant that could be associated with the original supernova
explosion that created the black hole. Several faint radio sources were also
detected in the radio field within the inner $\gamma$-ray confidence contour
and their spectral index estimated. Some of these sources could be the expected
weak radio counterpart.
