  The anomalous Hall effect (AHE), typically observed in ferromagnetic (FM)
metals with broken time-reversal symmetry, depends on electronic and magnetic
properties. In Co$_{3}$Sn$_{2-x}$In$_{x}$S$_{2}$, a giant AHE has been
attributed to Berry curvature associated with the FM Weyl semimetal phase, yet
recent studies report complicated magnetism. We use neutron scattering to
determine the spin dynamics and structures as a function of $x$ and provide a
microscopic understanding of the AHE and magnetism interplay. Spin gap and
stiffness indicate a contribution from Weyl fermions consistent with the AHE.
The magnetic structure evolves from $c$-axis ferromagnetism at $x$ = 0 to a
canted antiferromagnetic (AFM) structure with reduced $c$-axis moment and
in-plane AFM order at $x$ = 0.12 and further reduced $c$-axis FM moment at $x$
= 0.3. Since noncollinear spins can induce non-zero Berry curvature in real
space acting as a fictitious magnetic field, our results revealed another AHE
contribution, establishing the impact of magnetism on transport.
