Students and staff members at Oberle Elementary School in Bear gathered in the school parking lot on Monday to form a heart shape and say "thank you" to Delaware State Police troopers. The ceremony was part of a statewide outpouring of support in honor of Cpl. Stephen J. Ballard, who was killed in the line of duty last week. After the students arranged themselves in the shape of a heart, a teacher used a drone to photograph the formation from above. Students later delivered video from the event and handmade cards to troopers at Troop 2. Oberle is the second Christina School District school to pay tribute to Ballard. Last week, 600 Keene Elementary students walked to Troop 2 to lay flowers and thank troopers.