Complex sentence: Jacob explains that the army must have done something to them, and they hire a lawyer to investigate, who later backs out after reading military files documenting that the soldiers were never in combat, but were discharged for psychological reasons.
Split into simpler sentences: Jacob explains that the army must have done something to them, and they hire a lawyer to investigate. The lawyer backs out after reading military files documenting that the soldiers were never in combat and were discharged for psychological reasons.