Nothing. The main investigators were deposed by the defense team and it was confirmed there is no direct evidence. No dna, fingerprints or digital data that connects RA to crime scene or victims.
https://www.scribd.com/document/611146469/Unsealed-Probable-Cause-Affidavit-Richard-Allen-Delphi
There is quite a bit of circumstancal evidence.
A few things to remember:
.
RA originally placed himself on the trail from 1:30 until 3,:30.
He saw a group of girls on his way to walk on the high bridge as the group was departing. The left at approximately 1:30.
RA describes himself wearing the same clothes that BG wore that day.
He has no alibi that proves his changing statement that he departed earlier than originally stated.
His gun has a ballistic match to the round that was discovered between 2 dead girls. This is a gun that he has adamantly stated was never loaned out to anyone.
While this information may not feel compelling, if someone takes even just this SMALL tidbit of information, it is powerful.
How many grown men, wearing the same clothing, walked that trail at those exact times and had THEIR bullet from their gun found at the crime scene?
This is only the tip of the iceberg for the public IMO.
He has made repeated confessions to many people.
Circumstancal evidence still wins many cases. TV shows have us believing that a crime cannot be proven without DNA and/or fingerprints. And...I am willing to bet that a bombshell could be dropped during trial. Of course, that is my opinion only.
AJMO
https://www.scribd.com/document/611146469/Unsealed-Probable-Cause-Affidavit-Richard-Allen-Delphi
Unsealed Probable Cause Affidavit - Richard Allen, Delphi
www.scribd.com