If Special Relativity is a correct theory of the speed of light, then it should reduce to classical models for non-relativistic speeds. In this paper, we reveal a glaring error in the prediction of the Special Relativity Theory (SRT) and Lorentz Transformation (LT) . A ‘stationary’ light source emits a short light pulse at time t = 0, at which instant an observer/detector is at distance D from the source and moving away from the source with velocity v. For non-relativistic velocities, the time of detection of the light by the observer/detector is equal both in the reference frame of the light source and in the reference frame of the moving observer/detector. Using strict application of Lorentz transformations, we will show that SRT makes inconsistent predictions in the two reference frames. We also present a disproof of the second postulate that has been overlooked for more than a century. By disproving both postulates, this paper dismantles the foundation of relativity theory.