A few thoughts (sorry for the length, just thinking):
1. Several threads ago there was a post about a helicopter video and possibly tire tracks that led from a building towards the creek. Does anyone remember this? What was the building - Indiana Packers facility or the storage facility?
2. Can someone re-post the map that showed the bridge, drop-off area, where bodies were found, etc along with labels indicating what surrounding buildings are? If it is a private residence, just state that - do not include the name of the owner.
3. Many past crimes (including NY's Son of Sam) were solved, in part, due to parking/traffic tickets. I'm wondering if investigators have looked at any calls over the last several months (even going back a year) that may have involved a car seemingly parked where it seemed out of place, was parked for a longer period of time or at "off" hours, someone driving around that didn't seem to have a purpose or that someone else reported as suspicious, etc. Even maybe public drinking. BG may have spent time scoping out the area for months before getting up the nerve to strike. The search for this type of info should also include any surrounding areas that could be similar (parks, trails, etc) that may still be within his comfort zone.
Also, someone awhile back made a VERY good point people may think someone they know or have come in contact with resembles the suspect and may have even "joked" about it with him or that the suspect himself may have joked about it but that people "ruled him out" because he claimed he had an alibi. Something like - "It's a good thing my wife and I were in (blank) that day or I swear the police would think it was me." This may cause people to not report him to LE because they think he's already "clear".
I would love to see LE encourage people to report ANYONE that think resembles this guy EVEN IF THE GUY CLAIMS HE HAS AN ALIBI!