KENOSHA COUNTY, Wis. (CBS 58) -- On Thursday, May 28, Kenosha police arrested two suspects in a 22-year-old homicide cold case. Below is the information provided by the criminal complaint.

2003: INITIAL INVESTIGATION

On Sept. 23, 2003, detectives responded to a 911 call near 391st Ave. and 90th Pl. in Genoa City in Kenosha County.

Kenosha police state the call was made by Roxanna Collins (then Vanderzee). She found her husband, David Vanderzee, dead on the floor.

According to Collins, she came home, saw her husband dead, dropped her purse and ran outside to the neighbor's house.

Vanderzee was observed to be lying face down on the ground with a pool of blood underneath the head area. It was determined he was shot five times in the back of the head.

Bullet fragments indicate it to be a .38 special/.357 magnum.

Collins initial interview states she worked until 5:45 p.m. and went shopping in Gurnee, Illinois when she received a phone call from Vanderzee between 6:15 p.m. and 6:45 p.m. She returned home around 8:00 p.m. and saw Vanderzee on the floor, became hysterical, grabbed the cordless wall phone and called 911. She then ran out of the house and made contact with her neighbors.

She declined to submit a Certified Voice Stress Analyzer (CVSA) examination, even after law enforcement explained it could eliminate her as a potential suspect.

Police interviewed the neighbors who stated that Collins ran over to their residence screaming her husband was shot. She dropped her phone and one of the neighbors picked it up to speak with 911.

At the scene was John Viskocil, who stated that he was friends with Vanderzee and had been at the house around 3:00 p.m. and 4:00 p.m. that day.

On Oct. 9, 2003, police followed up with Viskocil who stated he was actually at Vanderzee's home closer to 2:00 p.m. and was there for only a minute. He stated he left, went to his house, cleaned and covered his boat. Later, he went out fishing around 6:00 p.m.

He stated that on the boat he did talk to Collins on his cell phone. He also said he fell off the boat when he returned to the dock, gone home and changed.

According to Viskocil he was shocked that Vanderzee gave Collins money to go shopping and stated that Vanderzee was very controlling of her. In the complaint Viskocil spontaneously state "Dave is not stupid. He had loaded guns in the house. He never saw it coming."

When asked if he was willing to take a CVSA examination he refused, stating he had to protect his rights.

On the day Vanderzee was killed, Viskocil stated that a friend told him cops where at Vanderzee's home. Viskocil's girlfriend drove him over and that Collins stayed the night at their place.

On Oct. 14, 2003, detectives spoke to Viskocil's then girlfriend how stated she was home around 6:00 p.m. and Viskocil wasn't home. Collins called the house, and they spoke, right after Viskocil came home, but she didn't recall him coming home wet. About 30 minutes later they were called about Vanderzee being shot.

Police noted that at that time of the phone call it was not public knowledge that Vanderzee was shot.

According to the girlfriend, the day of the funeral Viskocil broke things off.

Police searched Viskocil's residence on Nov. 11, 2003, which it was revealed that Collins has been living with him for about a week.

Police collected 32 long caliber bullets, a box of 38 special caliber semi-wadcutters, a box of 38 special caliber bullets and an antique gun along with two .38 caliber revolvers.

On Nov. 13, 2003, detectives received a call from Mike Serio of International Claims Specialist was requested to investigate a life insurance claim for Vanderzee.

A warrant to search Collin and Viskocil's phone records revealed a lengthy timeline of the phone calls that took place between the two the day of the incident starting from 7:00 a.m. and ending around 8:00 p.m.

2012-2013: REOPENING OF CASE

In October of 2012 detectives followed up with Collins and her husband. She was informed of the case reopening. She stated she hasn't been in contact with Viskocil since 2006 and confirmed to move in with him after Vanderzee's death.

Police noted that she showed "no emotion and was very nervous."

When speaking to her now husband, he stated that he thought Vanderzee passed away due to a medical condition and had no idea he had been murdered.

Police respoke with Viskocil's ex-girlfriend who stated that looking back it did appear that Collins and Viskocil were having an affair. She stated that on the night of Vanderzee's death the first thing Viskocil did when he came home was put his clothes into the washer. Viskocil told her that Vanderzee was murdered because "he screwed over some guys involved in gun running."

While reviewing the initial 911 call detectives noted that Collins had "the same demeanor" throughout the call in the first half and it was "quiet" in the background. About five minutes in the neighbor's voice could be heard speaking to 911.

Re-talking to the neighbors in February of 2013, one stated that Collins was hysterical and the other stated that her display seemed rehearsed.

2025: THE ARREST

Police re-spoke to the ex-girlfriend in April of 2025. She disclosed all the previous information stated but noted that the phone call from Collins was odd. She confirmed that Collins spent the night, and the next day saw Viskocil and Collins on the coach holding hands.

She mentioned that while she was moving out of the home, Collins already moved some personal belongings in.

Detectives made contact with another next-door neighbor that has been living in next to the Vanderzee's home since 2003 and still does. Stated that Collins arrived home every day at 6:00 p.m. sharp and it was out of the ordinary for her to come home after 8:00 p.m.

Detectives made contact with Viskocil via phone, who stated without prompt "I have a lawyer if this pertains to that shooting case years ago." He said he got one when "it all went down because it was a big mess."

Viskocil acknowledged that the entire investigation did lead right to him. He said "Yeah, I guess it does, it looks bad, I know in a minute, ya know, I'm fishing. I had no real alibi other than I was out on the boat."

Police conducted a timeline utilizing a pontoon boat and timed the trip to the area Viskocil said he went fishing at Lakeside Park on Powers Lake. They arrived in ten minutes and walked from the park to Vanderzee's home around five minutes.

The police concluded that with the investigation, crime scene, physical evidence and statements given that Viskocil and Collins would be charged with first degree intentional homicide.

Viskocil is being held at Kenosha County Jail.

Collins is being extradited back to Wisconsin from McHenry County, Illinois to the Kenosha County Jail.