A man shot himself in at about 5:40 p.m. Tuesday, Mentor Police Lt. Dan Molnar said.
The man's name has not yet been released. He is a 37-year-old man from Mentor-on-the-Lake
Before he shot himself, he called the police department and said he had information about burglaries in the area.
When an officer arrived, he saw the man standing near the parking lot, as well as a second person by the park's restrooms.
The second person was not with the man and only there by chance, Molnar said.
The man said to the officer about the other person, "You need to get him out of here. He shouldn't see what's about happen," Molnar said.
Then the man took a few steps back, got on his knees, put a gun in his mouth and fired a single bullet, Molnar said.
The man never threatened the police officer or anyone else, Molnar said.
The man was alive when Mentor firefighters took the man to TriPoint Medical Center in Concord Townshp. As of 10 p.m. Tuesday, he was in critical condition at MetroHealth Medical Center in Cleveland, Molnar said.
The man had left a note in his truck, Molnar said. However, all it did was list three family members' names and say "Please call."
Molnar said police had no information as to why the man shot himself or why he called police beforehand.