After witnessing the aftermath of the 1999 Wedgewood Baptist Church shooting as a Fort Worth police officer, Sullivan said he has an idea of the panic following such situations.
He said preparation for an active shooter is imperative and can come through education and simulation drills.
"In Mineral Wells, we will conduct practice active shooter scenarios," he said, explaining students will not be involved in any of the increased drills.
There are no absolute answers in dealing with individuals intent on committing such a heinous crime, Sullivan said, adding preparation among everyone involved is the best option.
"Schools are as prepared as they can be at this juncture," he said, "minus some funding."
He added his agency is committed to assisting local school leaders in providing a safe environment for students.
At last week's State of the Community address, both Haterius and Palo Pinto County Sheriff Ira Mercer remarked on the importance of addressing the issue.
Haterius included the furthering the conversation about school safety as one of four goals she set for the future of the MWISD.
"We've got to provide a safe environment for our children," she said.
Mercer said he has met with Haterius and other county superintendents to discuss options and has already implemented certain measures designed to increase safety on campuses.
His agency has "limited resources," he said, "but we can try to be prepared with the resources we have."
He said deputies will soon be able to identify points of entry and important areas of facilities from their in-car computers.
While MWISD has a dedicated school resource officer, Mercer said county schools do not, though county agencies have discussed rotating law enforcement officers between the county's school districts.
"We've gotten some really good feedback from rural schools," he said.
Beginning this week, he said deputies will walk through county schools at least once per shift.