well the premise of the show is that a cold case detective((retired)) has got onto investigating this ed edwards who, after a very storied life, finally admitted to at least 5 killing which he was convicted for, the ret cop hooks up with the grandson of ed edwards and they go around the country to different locales as the det tries to prove his theories to him, is it all bs... idk...its interesting tho because that ed edwards was a seriously brutal fellow from what is 100% known about him and if hes in the vicinity of any type of murder of this sort, he has to be a suspect ...and he was in the vicinity of alot of murders when they occured, the zodiac, atlanta child killings, jon benet ramsey even, none of which are the 5 murders he admitted to/was caught for...
out of the 5 he admitted to, 4 were in the same style/motiff/MO as the zodiac killings and the 5th was of a kid/young man that he legally adopted...took out a life insurance policy on and then subsequently killed for it, total dirtbag this guy was, its only been 4 episodes and for sure some of the evidence is sketchy ...some of it is compelling...but all of it is interesting
he was also a good friend of jimmy hoffa's, the two were cell mates and he was in around the area jimmy was in, the two were known to have gone out for dinner several times and jimmy went missing when he was going to meet someone at a resturant...theres more to ed's angle on the hoffa case but just another interesting tidbit....