In this paper we will describe advances in microbolometer uncooled thermal imaging sensor technology as they apply to law enforcement applications. Improvements in sensor performance that will be described include: (1) reduced pixel pitch, (2) increased spatial resolution, (3) increased thermal sensitivity, (4) reduced electrical power, and (5) reduced size. Since cost considerations dominate many, if not most, potential law enforcement applications, microbolometer sensor cost issues will be addressed in terms of current and projected cost trends. In addition to the use of theoretical considerations in describing microbolometer technology advancements currently being made or planned, examples of actual improvements, in the form of real imagery and/or actual performance measurements, will be provided in the paper. Finally, we will look at those areas of law enforcement that are most likely to benefit from the application of microbolometer uncooled thermal imaging sensor technology. These include: (1) surveillance sensor systems, (2) unattended sensor systems, (3) mobile sensor systems and platforms, and (4) gunfire localization and counter sniper systems.