WEST ALLIS, Wis. (WLS) -- There's new insight into the apparent bizarre motive behind the random shooting that killed a suburban mom on a Wisconsin highway. The I-Team obtained documents detailing what lead up to the attack.
A 20-year-old man is charged in connection with the shooting death of a mother of two from north suburban Buffalo Grove.
Zachary Hays, of West Allis, Wis., faces one felony count of first degree intentional homicide and three felony counts of first degree recklessly endangering safety, according to the Sauk County (WI) sheriff's office.
He is also suspected of killing a man hours earlier in suburban Milwaukee. Authorities say Hays kicked down the front door of his downstairs neighbor's apartment early Sunday morning, then shot 42-year-old Gabriel Sanchez, killing him. Neighbor Jesse Awonohopay is still trying to make sense of it.
"It's pretty surreal. I just can't believe it," said Awonohopay.
Hays and his older brother live right across the hall from Awonohopay.
"They would come over to my place, we would have a couple beers, I'd go over to their place. They were really friendly," Awonohopay said.
Police say after killing Sanchez in West Allis, the two brothers apparently picked up a third brother and drove to the Madison area and were near Wisconsin Dells when the suspect fired into another vehicle, hitting Tracy Czaczkowski, 44, of Buffalo Grove in the neck. She died Tuesday.
According the criminal complaint filed Wednesday afternoon, Zachary's brother Jeremy told police Zachary was acting paranoid since smoking marijuana a couple days earlier and he driving with a .45-caliber handgun in his lap.
According to the complaint, "Zachary was 'freaking out' about the tinted windows on the sedan... Zachary slowed down to let the sedan catch up on the left side... Zachary then shot at the black sedan three times."
For nearly 20 miles, police say the suspect and his two brothers sped down Wisconsin roads. Witnesses said they were throwing out beer cans before police used road spikes to stop them.
"He starts chucking beers out the window at us, and then I put my head down to take down his license plate, and he started shooting," said Gjuana Huewitt, a witness.
Video posted on YouTube shows the moment Wisconsin police shot the alleged gunman. Driver Joel Graves was talking to his wife as he recorded the madness so many other families saw that day.
"There's a guy walking in the middle of the highway. Oh, he just got shot," Graves says in the video. "Somebody just got shot in the middle of the interstate."
Police have offered no motive at this point for either shooting.
"Never had a beef with him, I never saw him arguing with anybody. They were nice kids," Awonohopay said.
The charges against Hayes were filed in Sauk County, but more charges are still expected for the murders in West Allis.
Hayes remains hospitalized in Madison after being shot by police on Sunday. Police said his injuries are not life-threatening.