Some random thoughts:
1. This article here:
http://articles.chicagotribune.com/...20110614_1_nydia-hohf-first-homicide-murder/3 The detective believes a glass cutter was used, hole was too small, then glass broken after scoring it with an X. Ok, why not use the cutter to make hole bigger? Why break glass when 5 and potentially 7(1 son at sleepover the other at college) people were in the house? Would your average person think to score a window before breaking?
2. I'm not completely convinced a glass cutter was used. Maybe he broke the window with the butt end of the flashlight and through a freak occurence it left part of the opening jagged(as described by Nehf) and another portion showing part of an almost perfect circle.
3. Valerie apparently had defensive wounds on arms, knee, and left foot. This would indicate killer didn't mount victim on bed.
4. It's interesting that the step mom didn't check out the sound of breaking glass, especially since this was so close in time to the Speck murders. When her screaming awoke the Senator, he said the first thing he thought of was Speck.
5. Also interesting to me is that the breaking glass didn't set the dog off.
6. According to Dr. Nehf it was a very bloody scene. Killer leaves with weapon and presumably blood on clothes. Although if he was leaning by bed, he might could have avoided quite a bit. Anyway, he's caught in act then flees. You'd think there'd be a blood trail to the beach at the very least. It would be interesting to see that blood trace evidence.
7. 4:30-5:00am seems a strange time to plan a crime. Maybe the senator woke every morning at 5 or 5:30. That wouldn't be all that unusual. It certainly doesn't leave much time to commit crime and get out.
8. What's with all the tools? Flashlight, glass cutter(if), snips, weapon. Where did he carry all these things? Then, he enters room, puts hand over Valerie's mouth with flashlight in other hand. So, where's murder weapon? I guess he could put flashlight down commence murder, then pick it back up. When step mom entered he had flashlight in hand apparently. Maybe he attacked Valerie then removed hand from mouth which allowed her moans to be heard.
9. In the accounts I read, no quote from the step mom mentions glasses. Yet they appear in the sketch.
10. It's possible seeing Sharon return from "date" is what set the killer off. She was wearing Valeries coat, from a distance it would be easy to mistake the two, I'm sure.
11. The accounts I've read mentioned blows to head and stabbing to chest. For some reason I've got the notion that it was two separate weapons. That would be helpful to know.
Motives:
1. Burglary: This is the one I discount the most. No pro targets a home with a dog, an alarm, and 7 potential witnesses. It's also unlikely that a glass cutter would have been used. Much more efficient ways of gaining entry. Killer apparently went to Valeries room. Any real valuables would most likely have been in parents room. Plus, nothing of value was reported as missing. The only thing that leads in this direction are the snips to cut screen and potential glass cutter. Burlary using supposed same method previous summer is interesting. But anyone with knowledge of that could have used same method because he thought it worked.
2. Rape: I don't really buy this one either. Again, you've got a house full of people. Not the target for a rapist, certainly not an experinced one. Glass cutter(if one), snips, flashlight, these don't seem items that are part of typical rape kit. There's also no indication of rape, other than nightgown being pushed up, which Dr. Nehf could have done when examing or could have happened during struggle. Police would have given this to press. Rape gone bad suspect is going to be a little different than one solely interested in murder.
3. Murder: Seems most likely to me. Targeting either Valerie, Sharon or the Senator. I would guess this is a spur of the moment type of crime. Meaning something decided that night or maybe a few days earlier. This way, the Unsub doesn't have much time to think things through. Again, alarm, dog, 5 maybe 7 people in house, breaking glass, etc.
Suspects:
1. Family member in house. I could give you some good motives. It's the massive and well thought out cover up that I find hard to believe.
2. Jay and Sharon were dating since at least Jan. 1966(photo in Life magazine). Married 7 months after murder. 2 prominent families, 1960's, you're looking at an engagement lasting at least 6 months, couldn't find a when that occured. So, who was Sharon on a "date" with? If it was Jay, I'm sure that would have been mentioned. Maybe she rejected the guys advances or told him she was marrying Jay. He sees her go into house, makes note of room, mistakenly seeing her return coat to Valerie. Goes home, stews about it, drinks, gets angrier, grabs some items and goes to Percy house.
3. House worker: Possible, but then you'd be talking about rape gone bad in my opinion. I don't think that's the case.
4. Someone from Valeries college, Cornell I think. You'd be talking plane again, which seems unlikely.
5. Vietnam vet or someone who lost relative in 'Nam recently. This would at least give motive if Senator was target. They'd show him how pain felt. Even if he was against war, not sure, your avg person doesn't know what their Senator stands for.
6. Friend or acquaintance of Valeries. I tend to like the theory mentioned above with the campain worker who lived nearby. Gut feeling tells me it was someone within walking distance. If he ate at house, something could have set him off when he got back home. This would tie in with the rash nature of crime.
7. Burglary pros. I give very little credence to this. One of Malchow's relatives said he always had to talk him down from rapes during their burglary spree. Still, he also talks about much more professional entries than this. In the picture I saw of Malchow he wasn't wearing glasses.