You have these answers then?
Please share them with me
The thing is not whether I have the answers, it is whether you have them.
Was Weitzman the only person allowed to examine this weapon?
Unlikely.
Exactly how this mistake could have been made?
This has already been explained to you. He did not examine thye rifle closely, he said what he thought he could identify based on an obscured view from a distance. Since the 7.5 mauser and the 6.5 carcano are vidually very similar, this is an easy mistake to make. Have you looked at any pictures of the rifles and scopes, such as those already provided on this thread?
Why did the Dallas Police department release information to the News Media concerning the rifle being a 7.65 Mauser before making sure the identification was certifiably correct.
Who knows. However, it is not uncommon for prelimnary statements to be made and later found to be in error.
How was the identification of the rifle properly made?
How was the identification of the scope properly made?
I would imagine by being properly examined by the people who came to collect it, wouldn't you?
Why did it take till the following day to identify it properly?
Who says it did? It might have taken that long for a proper investigation of its status and forensic evidence to have been compiled and released as a report. That doesn't mean the people who collected it were not able to identify it in five minutes flat once they had it in their possession.
Who made the identification of the rifle?
Who made the identification of the scope?
I have no idea.
Were is there additional testimony that explains these issues?
Why should there be any? This is normal stuff for an investigation. I suspect the only reason the initial report of a 7.5 mauser was issued too early was because of the high profile nature of the case and the media clamouring for information.
If Weitzman was incompetent why was he allowed to identify the rifle and the scope?
Who said he was incompetent, and who said he was 'allowed' to identify the rifle and scope? He found it and offered his thought on what it was based on his initial observation of an obscured rifle from a distance. That's all he did. Where is the official testimony, since you seem intent on asking for this stuff, that said Weitzman's identification was in any way official and not just his own unsolicited observation?