jeremiah mumford from new hampton. >> jeremiah mumford is 24 years old. ce is william clayton. today is clayton's 19th birthday. their vehicle is filled with weapons, including two ak-47s which mumford legally purchased in iowa. >> a green '96 ford taurus four-door. licensed to williams -- >> a 1996 ford taurus is hardly the type of car that can outrun a police vehicle. it has 145 horsepower, far less powerful than the engines in most law enforcement cars. but that doesn't stop clayton and mumford from trying to outrun the police. they head north on the labyrinth of gravel roads that crisscross this section of iowa. fayette county deputy sheriff joe miller picks up the chase as captured by his squad car dash cam. >> 60 miles an hour. approaches. >> i'm getting closer and closer, and all of a sudden, i heard something, sounding like a rocket in my car or something. we're traveling at a pretty good rate, 60 miles an hour on a gravel road. and i heard it again. i was like, something ain't right. >> the next moment, miller realizes shots are being fired. >> sh