Drugs may have fueled a crime spree that started with a murder in West Allis, and ended with a mother shot and killed while driving on a rural Wisconsin interstate, according to court documents.
Twenty-year-old Zachary Hays is charged with murder, and three counts of recklessly endangering safety.
Detectives heard the horrific timeline of events from Hays' older brother, who said Hays became increasingly paranoid after he smoked marijuana.
The ordeal started at the suspect's West Allis apartment Sunday, where police say Hays killed his neighbor, Gabriel Sanchez.
He then took off to Sauk County, with his two brothers held captive in his car.
Court documents show the suspect's brother describe his sibling driving erratically "flipping people off" and "Zachary was particularly paranoid about cars with tinted windows."
That's when he spotted a a vehicle with tinted windows, which turned out to be a family of four visiting the Wisconsin Dells from Illinois. The mother in the vehicle, 44-year-old Tracy Czaczkowski, was shot while sitting in the front passenger seat.
Autopsy results show she had one bullet wound that went through her neck.