Resistivity and specific heat measurements at low temperatures on CeIn_3-xSn_x samples with concentrations x=0.6, 0.65 and 0.7 demonstrate that with increasing Sn-alloying, the antiferromagnetic ordering temperature decreases continuously down to T=0 K and disappears at a quantum critical point. We observe non-Fermi liquid (NFL) behavior in the resistivity and the specific heat, however the temperature dependencies are different from the predictions for a spin density wave (SDW) scenario. The resistivity at the critical point shows e.g. , a linear temperature dependence, as expected for two dimensional fluctuations, which however can be excluded in the cubic structure of CeIn_3-xSn_x.

PACS numbers: 71.27.+a, 71.10.Hf