Bs Mixing, DeltaGamma_s and CP Violation

We discuss the results from the Tevatron experiments on mixing and {\sf CP} violation in the $B_s-{\bar{B}}_s^0$ system, with particular emphasis to the first measurements of the decay width-difference $\mathrm{\Delta }{\mathrm{\Gamma }}_s$ and the {\sf CP} violating phase ${\beta }_s$ using flavor tagging information. We also briefly review the charge asymmetry measurements in semileptonic $B_s$ decays and in $B^{\pm }\to J\mathrm{/}\psi K^{\pm }$ decays.