How would you know how long it would take a man to look at fish on a platform of the Monon High Bridge? Maybe he just stopped to look at fish for a short while, walked back not too far behind the woman who saw him, and was passed the point of the Mears entrance when Abby and Libby then started walking to the bridge. Then Abby and Libby walked to the Monon High Bridge and someone came up from the other side. This person then probably left the same way after committing the crime.
What if the witness(BB) is wrong about the 2 girls she saw or if she did not see them until she was almost back to her vehicle at the Mears entrance as they were getting prepared to walk down to the bridge? She obviously did not leave right away if her vehicle was not observed leaving until 2:14pm.
When Richard Allen left in his black 2016 Ford Focus, did it pass the Hoosier Harveststore camera at around 4pm? Can LE at least prove that by showing the car that arrived at around 1:30 on the Hoosier Harveststore camera is the same one that left at 4pm, thereby establishing that whoever drove that car was in the park area for at least 2 and a half hours?
I would only vote guilty in this case if there is some sort of strong evidence, DNA, confessions with known details only the killer would know, or evidence found of the girls during the home search that tie him to the crime. I would want to be sure the right person was being convicted of the crime.
It definitely helps to know details of the case, like the confession details or strong evidence like DNA or other forensic evidence, if the prosecution has any besides an unspent cartridge that was matched to Richard Allen's gun. Everyone looks at the case differently.