The shooting happened around 4 p.m. Aug. 16 in the 1200 block of East Wilson Street in Batavia, police said.
A 39-year-old man armed with a firearm allegedly fired at police officers, officials said. Officers also shot their weapons during the incident.
The Kane County Major Crimes Task Force investigated the police-involved shooting.
The investigation has now been completed and reviewed by the Kane County State's Attorney's Office, officials announced Tuesday.
Police responded Aug. 16 to a call of a person harming himself.
Police said 39-year-old Michael Seidelman fired at officers with an AR-15. They returned fire, and 30 minutes later, officers entered the apartment and found Seidelman dead.
An investigation found that he died from a self inflicted gunshot to the head, officials said.
If you are experiencing suicidal, substance use or other mental health crises please call or text the new three-digit code at 988. You will reach a trained crisis counselor for free, 24 hours a day, seven days a week. You can also go to 988lifeline.org.