New poster. Registered because I live in west metro Denver in the foothills. And have so on and off since 1974. My thoughts, for what it's worth.
1. I agree with MisterMayor, in his websleuths radio interview, that it is someone intimately familiar with the open space and trail linkage. Perhaps a mountain biker or jogger - a twenties-something person who grew up here. (Thank you websleuths radio for your interview with MisterMayor!) 82nd Ave (Leyton) and Pattridge Park are so lonely and windy. The wind can get so strong it sucks your lungs inside out. It's not a picnic area like a regular city park. It is just south of the old Rocky Flats military plutonium trigger factory. Leyton (82nd Ave) is curvy and narrow. Regular commuters take Coal Creek Canyon and Hwy 93. Model airplane people fly their planes at Pattridge Park. There is a trail on the opposite hill of where little Jessica was found at the culvert. The culvert has a huge pull-off shoulder on each side of the road. It is in between the two "real" parking areas where the hikers, mountain bikers and model-airplane people park. The barbed wire fence is easily crossable, as it is down on either side of the culvert and stretches about 4 feet above the culvert.
2. Jessica's house is such a short distance from Chelsea Park. The houses are shoe-horned in and the residents park against the sidewalk on the street. The cars just drip onto the sidewalk Jessica would've walked. The only way, IMHO, Jessica could've been forced into a car is if she walked by a car parked against the Chelsea Park sidewalk and the monster was like Ted Bundy and stood outside and shoved her in. But the way the houses are so close - that seems impossible unless there were two people. And that seems impossible. It's almost like Jessica was offered a ride by someone she knew, IMHO.
3. The Rock Creek subdivision where the backpack was found, and Nancy Grace's declaration (yet not reported in our Denver media) that her clothes were folded, is isolated and like Hotel California - you do not enter or exit easily unless you know how to.
4. The Rock Creek intersection of Alpha and Andrew, Jessica's house, and the lonely culvert on Leyton make an almost perfect isocles triangle - not sure if that means anything.
5. Jessica's house is next to JeffCo airport where people watch planes and helicopters take off - there were many people watching the slurry planes and helicopters during our summer fires.
6. The Aurora attempted abduction with a rag is just a couple of drunk opportunistic men, IMHO.
7. The Boulder-bolder jogger's neck-grabbing attempt of the young boy in May at Fenton Lake is real but it was a boy. But that brings up the trail connection. The jogger repeatedly did his loop on the trail like he was scouting.
8. Pattridge Park is in between Golden's School of Mines and CU Boulder. Hwy 93 connects them. However, based on experience, college kids park and make out on Lookout Mtn (Golden) and Chattaqua Park (Boulder). But it is stated that teens party in the old cement coal shacks on Leyton. College kids from Mines and CU Boulder should comment on this. My Mines former college student friend states he never heard of Pattridge Park and never noticed Leyton.
9. It is just a short drive up into the foothills where nothing would've ever been found. Whether that was not done because the monster did not have a regular car and he had to use a mountain bike, or because he wanted to make a statement, I cannot determine.
10. I think it is a local, healthy, young male who knows the open space and trails.