BAILEY, Colo. -- Three weeks after a gunman invaded a high school and killed a 16-year-old girl in Bailey, school district officials say they'll be spending more to step up patrols there for the rest of the academic year.

The Platte Canyon school board will spend $100,000 for the patrols at the high school and its two other schools -- Deer Creek Elementary School and Fitzsimmons Middle School.

Before the shooting, Platte Canyon High School normally had a sheriff's deputy on campus, but he had been called away to work on a case when the gunman Duane Morrison walked into the building and held six students hostage.

The school board will also pursue grants for security guards, surveillance cameras and other technology and to pay for the long-term mental health needs in the aftermath of the standoff that left student Emily Keyes and Morrison dead.

In addition, the board said the Colorado State Patrol has agreed to conduct a security assessment of all three schools and to provide recommendations for appropriate safety measures.

Through an agreement with the Park County Commissioners and the Park County Sheriff’s Department, deputies will patrol all entries to school property, parking areas and school grounds during the school day, and at evening and weekend school events for the remainder of the school year.

The Platte Canyon Board of Education said the money for extra security comes from its contingency reserve funds.

The district will form a safety task force, to include staff, parents, community members and law enforcement, to help determine what safety measures should be put in place. Schools have already begun surveying students and parents regarding suggestions on how to improve school security. Parents are also being asked to serve as hall and door monitors at the elementary, middle and high schools. To volunteer, parents should call the District, 303-838-7666, and press the appropriate extension for their school.

Morrison barricaded himself and six girls in a room at the high school on Sept. 27. He let four girls go before breaking off negotiations. A SWAT team used explosives to enter through the room's single door. One girl escaped but Morrison shot Keyes as she tried to run. She died at a hospital in Denver, about 40 miles northeast of Bailey.

Morrison was hit by three shots fired by SWAT officers, but a preliminary autopsy indicated he died of a self-inflicted gunshot wound, officials said.