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The County of DuPage
Wheaton, Illinois

Press Release

Contact Information: Director of Communications: 630-407-8160

Friday, June 29, 2018

Naperville Man Pleads Guilty to 2015 Attempt Murder

DuPage County State’s Attorney Robert Berlin announced today that a then eighteen-year-old man charged with entering a Naperville home and stabbing a husband and wife while they slept has entered a plea of guilty to one count of Attempt First Degree Murder and one count of Home Invasion. Both charges are Class X Felonies. Zachary Machnikowski, 21 (d.o.b. 3/6/1997) of Spring Garden Circle, Naperville, appeared in court this morning where he entered his plea of guilty in front of Judge Liam Brennan. Machnikowski has been held in custody at the DuPage County Jail without bond since the attack. 


On March 31, 2015, at approximately 1:25 a.m., officers with the Naperville Police Department responded to a call of a person who had entered a residence on Iroquois Avenue and attacked the homeowners. Upon their arrival, officers found the husband and wife covered in blood. Each had been stabbed multiple times in the face, head and back. An investigation into the attack concluded that at approximately 1:15 a.m., Machnikowski entered the residence, armed himself with a large knife he took from the kitchen and went upstairs to the couple’s bedroom. Machnikowski then attacked the couple as they were asleep in their bed, stabbing the husband first. After the husband fought off the attack, Machnikowski fled the residence. Machnikowski was taken into custody within minutes by Naperville police officers. The couple was transported to a local hospital where they were treated for their injuries. 


“This morning, Zachary Machnikowski admitted that in the middle of the night, he broke into an innocent couple’s home, armed himself with a large kitchen knife, went upstairs and savagely attacked them while they slept,” Berlin said. “I can’t even begin to imagine the horror the couple must have felt when they were awoken in their own bedroom by a knife-wielding intruder. I would like to thank the Naperville Police Department for their truly outstanding work in the quick apprehension of the defendant in this case.” 


Machnikowski’s next court appearance is scheduled for July 25, 2018 for return of the pre-sentence report. He faces a prison sentence of between twelve to sixty years in the Illinois Department of Corrections.