We introduce AHEAD (Analogical Hypothesis Elaborator for Activity Detection), which performs case-based hypothesis elaboration using process models. We are using AHEAD to elaborate hypothesized hostile activities. In this application, AHEAD is given as input (1) structured evidence and (2) a hypothesis concerning the activities of an asymmetric adversary (e.g., a terrorist organization). The system outputs a detailed symbolic argument supporting and/or opposing the given hypothesis. Combining case-based/analogical reasoning techniques, using the FIRE Analogy Server with qualitative functional processes represented as Task-Method-Knowledge models, AHEAD extracts additional implications of the hypothesis to develop a coherent argument that supports and/or contradicts it.