their police work was to tell you to put out a rogue campfire or something, or don t park here, don t feed the bears. reporter: but there s more to it. every death in our national parks is investigated. and in toni s case the same emt ranger who came to rescue her now switched roles from rescuer to cop. people wear different hats at the park service. the guy who schlepped out there in the middle of the night and tried to both save toni s life and get harold off the mountain the next day became an investigator. reporter: the ranger set out to learn everything he could about toni, harold and what happened on that quiet mountain. harold told him the couple had set out around 1:45 on the deer mountain trail as part of their romantic anniversary weekend. you can see in this selfie harold took that the henthorns seemed to be having fun, on a track that many would find challenging. hikers call it a moderate hike. but these are hikers who are, you know, scaling the sides of
you to put out a rogue campfire or something, or don t park here, don t feed the bears. reporter: but there s more to it. every death in our national parks is investigated. and in toni s case the same emt ranger who came to rescue her now switched roles from rescuer to cop. people wear different hats at the park service. the guy who schlepped out there in the middle of the night and tried to both save toni s life and get harold off the mountain the next day became an investigator. reporter: the ranger set out to learn everything he could about toni, harold and what happened on that quiet mountain. harold told him the couple had set out around 1:45 on the deer mountain trail as part of their romantic anniversary weekend. you can see in this selfie harold took that the henthorns seemed to be having fun, on a track that many would find challenging. hikers call it a moderate hike. but these are hikers who are, you know, scaling the sides of mountains.
reporter: journalist michael fleeman covered the death of toni henthorn. i just thought the extent of their police work was to tell you to put out a rogue campfire or something, or don t park here, don t feed the bears reporter: but there s more to it every death in our national parks is investigated. and in toni s case the same emt ranger who came to rescue her now switched roles from rescuer to cop people wear different hats at the park service the guy who schlepped out there in the middle of the night and tried to both save toni s life and get harold off the mountain the next day became an investigator reporter: the ranger set out to learn everything he could about toni, harold and what happened on that quiet mountain. harold told him the couple had set out around 1:45 on the deer mountain trail as part of their romantic anniversary weekend you can see in this selfie harold took that the henthorns seemed to be having fun, on a track that many would find challenging.
reporter: but there s more to it. every death in our national parks is investigated. and in toni s case the same emt ranger who came to rescue her now switched roles from rescuer to cop. people wear different hats at the park service. the guy who schlepped out there in the middle of the night and tried to both save toni s life and get harold off the mountain the next day became an investigator. reporter: the ranger set out to learn everything he could about toni, harold and what happened on that quiet mountain. harold told him the couple had set out around 1:45 on the deer mountain trail as part of their romantic anniversary weekend. you can see in this selfie harold took that the henthorns seemed to be having fun, on a track that many would find challenging. hikers call it a moderate hike. but these are hikers who are, you know, scaling the sides of mountains. reporter: but toni and harold kept at it, following the trail as it snaked up and around the mountain to a point whe