  Bi$_{1-x}$Sb$_x$ is a topological insulator (TI) for $x \approx 0.03
$--$0.20$. Close to the Topological phase transition at $x = 0.03$, a magnetic
field induced Weyl semi-metal (WSM) state is stabilized due to the splitting of
the Dirac cone into two Weyl cones of opposite chirality. A signature of the
Weyl state is the observation of a Chiral anomaly [negative longitudnal
magnetoresistance (LMR)] and a violation of the Ohm's law (non-linear $I-V$).
We report the unexpected discovery of a Chiral anomaly in the whole range ($x =
0.032, 0.072, 0.16$) of the TI state. This points to a field induced WSM state
in an extended $x$ range and not just near the topological transition at $x =
0.03$. Surprisingly, the strongest Weyl phase is found at $x = 0.16$ with a
non-saturating negative LMR much larger than observed for $x = 0.03$. The
negative LMR vanishes rapidly with increasing angle between $B$ and $I$.
Additionally, non-linear $I$--$V$ is found for $x = 0.16$ indicating a
violation of Ohm's law. This unexpected observation of a strong Weyl state in
the whole TI regime in Bi$_{1-x}$Sb$_x$ points to a gap in our understanding of
the detailed electronic structure evolution in this alloy system.
