This is a go nowhere argument, it's easy from the defence's perspective to flippantly say that there will never ever ever be a fair lineup because in reality there will always be another endless reason why the current lineups were unfair for example, there should be more people in the lineup, the light was different, the distance was different, their skin colours must be closer, the hair colour and hairline must be the same, they weren't the same shape, their nationalities and race didn't go back to their grandparents etc etc...
Strawman fallacy. I didn't say there will never ever ever be a fair lineup.
These lineups were biased and unfair.
- Fillers should generally resemble each other and the suspect
- Fillers and the suspect should be dressed alike
- Fillers should resemble the witness's pre-lineup description of the suspect
- There should be a minimum of 5 fillers
- The person administering the lineup should not know who the suspect is
- If the suspect has an unusual or unique feature that would make him stand out then it should be concealed, or the fillers should have the same thing artificially added
- Witnesses should not attend lineups together
- The witness should not be visible to the suspect or fillers
- The suspect's position in each lineup should be randomly placed
- Witnesses should be told that the suspect may or may not be in the lineup
- Witnesses should be asked how certain they are of the identification
- Witnesses should not have been biased by media reports prior to the lineup
- Witnesses shouldn't be pressured to make a selection
https://www.ncjrs.gov/nij/eyewitness/eyewitness_id.html So it's good and all that you believe that you can get all the positive identifications thrown out on some form of technicality by screaming "unfair" unfair" but that's not how it works, you have to deal with the eyewitnesses like Callaway the ex-marine who saw Oswald with a weapon and didn't look like he could be intimidated.
"Didn't look like he could be intimidated". There's a scientific analysis for you.

But what does being intimidated have to do with anything?
It's not only me John, I know no one in my family would ever send a man wrongfully to his death and I'm betting that you and your family couldn't either.
Who ever said that anyone was wanting to "send a man wrongfully to his death"?
When you show the Police did something major to deliberately penalise Oswald
"Major" as defined as something other than what the police actually did.
then they may be a problem but considering that Oswald killed one of their own
Considering? Wasn't that what they were supposedly trying to investigate with these rigged lineups?
and was found with the weapon,
LOL
then on the whole the Dallas Police were quite restrained because I know if someone killed my friend I would have trouble holding back.
Exactly. They railroaded him, because they decided first that he killed a cop, and then rigged lineups to give them the answer that they wanted.