  The beta Mn type Co-Zn-Mn alloys have seized significant attention due to
their ability to host skyrmions at room temperature. Here we analyse the
unconventional magneto-transport properties of Co8Zn8Mn4 single crystals with a
Curie temperature of 275 K. A negative magnetoresistance is obtained over a
wide temperature range of 50K to 300K. The deviation of the isothermal
magnetoresistance (MR) curves from linearity to non-linearity as one approaches
higher temperatures points towards the transition from the dominance of magnons
to spin fluctuations. In the paramagnetic phase, the change in the shape of the
MR curve has been explained using the Khosla and Fischer model. The
relationship between the anomalous Hall effect (AHE) and longitudinal
resistivity reveals the dominance of the skew-scattering mechanism, which is
inexplicable based on the theories of semi-classical magneto-transport. We
experimentally determine that the spin fluctuation is the source of the
skew-scattering mechanism in Co8Zn8Mn4. In general skew-scattering mechanisms
predominate in compounds with high conductivity, but our findings demonstrate
that this is not always the case and that other aspects also require equal
consideration. Our work throws new light on the predominant scattering
mechanism in chiral magnets with skyrmionics phase at low conductivity.
