A Crystal Lake Park District police officer stands next to a metal detector set up for a park board meeting Sept. 22, 2025., prompted by security concerns. (Michelle Meyer)Heightened security at the Crystal Lake Park District board meetings will continue for the “foreseeable future,” as the board president says he feels “uncomfortable” after previous hostile meetings that included yelling, personal jabs and booing from the public. Crystal Lake Park District board President Frederick Tiesenga pats his chest while referencing the bulletproof vest he said he was wearing during a Sept. 22, 2025 board meeting. Only Crystal Lake Park District police were at the meeting, and no other agencies were brought in, Executive Director Jason Herbster said. People gather before a Crystal Lake park board meeting Sept. 22, 2025.