and the dirt road. sergeant ernst and detective scott stallman took us there. the package was supposed to be taped somewhere up along the power pole. reporter: greg carried a bright bicycle light, and gave his friend a child s baseball bat just in case. the men walked along the path and looked for the package, but couldn t find it. greg scanned the area with his light, and then noticed, there in the brush. he sees that it s actually a person laying on the ground holding a sniper rifle. that s terrifying. terrifying. reporter: the man appeared to be wearing camouflage. greg or jason yelled gun! or maybe run! and they turned and took off back to towards their car. and that s when mr. mulvihill was shot. and as they re running back they re hearing multiple bullets, or multiple rounds, whizzing past their head. reporter: they got in the car and took off . but then greg realized how badly he was injured. he pulled over and jason called 911.
like, uh, like in the army. he was hiding in the bushes. i m at home and i m sleeping. reporter: carlsbad detective sergeant darbie ernst was on-call that night. it s all hands on deck and we re calling up just about every detective that is available to come in. sergeant ernst learned the 911 caller was a man named jason kovach, and he was calling about his co-worker: diana lovejoy s husband, greg mulvihill. he said that his friend greg mulvihill had been shot and they needed assistance immediately. reporter: ernst learned that when the first officer got to the scene. he found greg in his car, bleeding from a gunshot wound. he was shot in the left side of his chest and the bullet went essentially in through the front and then out through the back. reporter: while greg was rushed to the hospital, a swat team combed the hillside where he had been shot. did they find the shooter? no. just vanished? vanished. reporter: but sergeant ernst heard a detail that