Remnants of the Vision

A town, once thriving with life now has little over 2000 residents. Many have died and more have disappeared. Victim 1 worked in the school faculty. Victim 2 did as well. Victim 3 went to the same school and Victim 4 was nowhere to be found. How long will it take before the town is completely void of life? There's no stopping someone set out to achieve their dream.