FILE - In this Thursday, Jan. 31, 2013 file photo, Douglas County Sheriff Department Lt. Brian Murphy spends some time on the playground with kids during recess at Buffalo Ridge Elementary School, part of a new cooperative effort between law enforcement and schools for more routine police presence at local primary schools, in Castle Pines, Colo. Since the December school attack in Connecticut, county police have begun a practice of completing their paperwork from their cruisers in elementary school parking lots, and are encouraged to spend more time inside schools. (AP Photo/Brennan Linsley, File)

FILE - In this Thursday, Jan. 31, 2013 file photo, Douglas County Sheriff Department Lt. Brian Murphy is greeted by children at Buffalo Ridge Elementary School, part of a new cooperative effort between law enforcement and schools for more routine police presence at local primary schools, in Castle Pines, Colo. Since the December school attack in Connecticut, county police have begun a practice of completing their paperwork from their cruisers in elementary school parking lots, and are encouraged to spend more time inside schools. (AP Photo/Brennan Linsley, File)

FILE - In this Thursday, Jan. 31, 2013 file photo, Douglas County Sheriff Department Lt. Brian Murphy walks a hall while spending some time at Buffalo Ridge Elementary School, part of a new cooperative effort between law enforcement and schools for more routine police presence at local primary schools, in Castle Pines, Colo. Since the December school attack in Connecticut, county police have begun a practice of completing their paperwork from their cruisers in elementary school parking lots, and are encouraged to spend more time inside schools. (AP Photo/Brennan Linsley, File)

FILE - In this Thursday, Jan. 31, 2013 file photo, Douglas County Sheriff Lt. Brian Murphy plays with students on the playground during recess at Buffalo Ridge Elementary School, part of a new cooperative effort between law enforcement and schools for more routine police presence at local primary schools, in Castle Pines, Colo. Since the December school attack in Connecticut, county police have begun a practice of completing their paperwork from their cruisers in elementary school parking lots, and are encouraged to spend more time inside schools. (AP Photo/Brennan Linsley, File)

FILE - In this Thursday, Jan. 31, 2013 file photo, Douglas County Sheriff's Lt. Brian Murphy sits in on part of an art class while spending some time at Buffalo Ridge Elementary School, part of a new cooperative effort between law enforcement and schools for more routine police presence at local primary schools, in Castle Pines, Colo. Since the December school attack in Connecticut, county police have begun a practice of completing their paperwork from their cruisers in elementary school parking lots, and are encouraged to spend more time inside schools. (AP Photo/Brennan Linsley, File)