RedactedNarrative: In summary, on 8-11-18 at approximately 11:45 hours, I (OFC) received a call-in regard to an Assist Rescue at Independence Grove Preserve.  As reported, a male subject had fallen from a boat and was not able to get back in.  The area referenced was the North end of the lake and near the bridge.  Libertyville Rescue had already been summoned and was enroute.  I acknowledged, returned to my vehicle, and responded from Lake Carina Preserve.
  Upon arrival, I observed rescue units already on scene.  I proceeded to the North portion of the preserve and entered the lower lakeside trail.  While driving the trail, I observed rescue units (on shore and in the water/on boats) actively searching.  (The area was slightly East of Leopold Point).  Shortly thereafter, I met with the victim’s friend who was standing by on shore.  He provided information for the victim.  Friend advised that he had been in the boat with Victim fishing that day.  Victim had not wearing a life jacket.  
  
  After fishing for several hours, Friend noticed Victim begin to shake as if some sort of seizure was setting in.  (He advised that Victim was diabetic).  Friend attempted to speak with Victim to determine what was wrong.  Victim’s speech was reportedly labored and indistinct.  Without warning, Victim fell overboard.  Friend made several attempts to grab onto Victim, but indicated Victim began to sink very quickly.   (At the time of the incident, a passerby heard calls for help and jumped in.  He swam and dove in the area Victim was last seen but did not locate him.   While I discussed the incident with Friend and Good samaritan, rescue continued to search.  Friend explained that Victim mentioned earlier that day he was a capable swimmer.  He and Victim reportedly had visited Independence Grove many times previously to fish/boat together.  Shortly thereafter, I escorted Friend to my vehicle to sit down and rest.  
  While we waited, Friend attempted to contact Victim’s mother and girlfriend.  They were eventually notified of the circumstances.  Both Victim’s mother and girlfriend responded to Independence Grove and met me at the maintenance area to wait.  While the search was still on-going, various family members related to Victim arrived at my area.  Everyone was briefed with the information I had at the time.  (During this time, I had occasional phone contact with Sgt. Banaszynski, who kept me informed of the search progress).  The mentioned parties remained at this for the remainder of the incident.  While speaking with Victim’s girlfriend, she indicated that she had eaten breakfast that morning with him.  He had always been diligent with his required insulin and had taken it that morning.  
  
  Sgt. advised that rescue dive teams had not been able to locate Victim initially.  They deployed side scan sonar at approximately 14:30 hours and the search continued.  Victim was eventually located and was removed from the water at 16:50 hours.  I was advised that Victim was deceased, and the Coroner’s Office had been notified.  Upon receiving clearance from command, I notified family and friends of the circumstances.  Friend turned over Victim’s property to me, consisting of: tackle box/tackle, a ball cap, fishing net, a pack of cigarettes, and fishing pliers.  
  Victim was recorded as having been located at GPS coordinates 42”18.9097 87”56.9504 in 35 feet of water.