Murphy says in episode Part 3 - I will link the actual episode: "he thought EF and his sister were full of crap" (his words), they interviewed him and got a DNA sample. Murphy drove him back home and that was when EF mentioned he spit on one of the girls.
So LE interrogated EF and got a DNA sample. EF said he spit on one of the girls, so why didn't they arrest him based on his DNA left on the body? It's because it didn't happen that way. LE, ISP and FBI are not amateurs, they would have been able to link him to the crime scene by his self proclaimed spit and his DNA.
And no where in their recount of the 3 day hearing did they say they debunked his alibi or that any of their other POI's during the entire day, quite the opposite. Holeman and Murphy both said they could NOT place any of them in Delphi that day.
#Justice4Abby&Libby
MOO
The Delphi Murders: Three Days of Pretrial Hearings: Day Three