Indiana Conservation Officers are investigating the death of an Indianapolis man recovered from Lake Monroe Sunday afternoon.

A little before 4 p.m., officers responded to a call of an unconscious person who had been pulled from the water near Allen’s Creek. Resuscitation efforts were unsuccessful, and the man, identified as 58-year-old Jeffrey Cox, was pronounced dead at 4:55 p.m.

According to a press release, Cox had been boating with a group of people when he went missing for 5 to 10 minutes before being found unconscious near the boat. Cox was not wearing a person floatation device.

The conservation officers were assisted by the Monroe Fire Protection District and Indiana University Health.