FOUNTAIN, Colo. (CBS4) – Two teenagers were found dead on the side of the road, and police say they were murdered.

The search is now on for their killer.

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Derek Benjamin Greer, 15, and Natalie Partida, 16 (credit: El Paso County Sheriff’s Office)

Derek Greer, 15, and Natalie Partida, 16, are best friends from Colorado Springs, both students at Coronado High School.

Sunday, a passerby discovered their bodies in Fountain near Pikes Peak International Raceway off Old Pueblo Road.

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“We have three witnesses just driving down the road; they live in the area and they called us as soon as they saw,” Jaqueline Kirby with the El Paso County Sheriff’s Office said.

(credit: CBS)

“I want people to see her as a really happy person, and that she didn’t deserve it. She didn’t,” Natalie’s friend Melisa Serrano said.

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(credit: CBS)

El Paso County Sheriff’s deputies are asking the community to remain vigilant as they continue to investigate.