 The study of many body physics with long-range dipolar interactions using ultra-cold polar molecules has progressed significantly and several groups are working on advanced apparatus for manipulation and detection. However, single-atom resolved in situ detection has yet to be demonstrated for these molecules. This paper proposes a technique for spin-resolved molecular detection using site-resolved microscopy and numerical simulation of spin dynamics to show its utility in a spin-diffusion experiment. This article was authored by Jacob P. Covey, Luigi DiMarco, Oscar L. Ersevedo, and others.