Slow-mode shocks in space have been identified via one spacecraft observation by many authors since 1970. However, Feng et al. suggested that the analysis using single-spacecraft observation based only on the Rankine-Hugoniot relations could misinterpret a tangential discontinuity as a slow shock. In this paper, we identify a slow-mode shock using a model fitting based on both the Rankine-Hugoniot relations and intraspacecraft timing. As a result, we found a slow-shock solution that, including the local parameters and propagation time, agrees well with the observations. The slow shock may be associated with an asymmetric reconnection exhaust at a heliospheric current sheet.