Why Would Tippit Leave Himself a Sitting Duck For An Armed Cold Blooded Killer ?

[Watson Phillips]

Why would an Experienced street wise officer like Tippit leave himself completely vulnerable to someone he suspected to be armed & had just committed capitol murder , by remaining seated behind the wheel of his patrol car and beckoning the person to speak to him thru the wide open passengers side window ?
 
I know he did not learn that in the Police Academy

[Jim Hawthorn]

Yes, I've always found that very bizarre and open to many interpretations. Take it away guys.

[Watson Phillips]

Growing up in my hometown in the early 70's the police started a program that centered around establishing relations with the community in which pre-teen youth , with their parents written permission, could spend a day riding with police for a day in their patrol car.
For a kid like me at the time it was something I was dying to do and my parents were glad to let me do so .
Being a young excited child, I think you had to be over 10 years old, in a brand new often imagined about environment I remember the experience fondly.
One thing that I do recall is that the officers were all business if there was any type of official stop , making sure I was securely locked in the car as they went to investigate a reported crime or suspected person.
The only time I saw them sit in the car talking to someone thru the window was if it was a person well known to them, not part of any official business, and they were completely at ease in doing so.

[Jim Hawthorn]

One thing that I do recall is that the officers were all business if there was any type of official stop , making sure I was securely locked in the car as they went to investigate a reported crime or suspected person.
The only time I saw them sit in the car talking to someone thru the window was if it was a person well known to them, not part of any official business, and they were completely at ease in doing so.

Absolutely. It seems like they already knew each other.

[Tom Graves]

Absolutely. It seems like they already knew each other.

Wowie zowie!

[Lance Payette]

Why is there any reason to think Tippit had any idea he was encountering an armed, cold-blooded killer? We'll never know why Tippit stopped or what was going through his mind, but it's completely ad hoc to say the stop was because he suspected Oswald was JFK's assassin. I don't say there is no issue at all here, but the suggestion there was something bizarre goes too far. Perhaps Oswald caught his attention for the same reason he caught Brewer's attention at the shoe store. Tippit pulled over just to check and Oswald was his usual cucumber-cool self until Tippit started to get out of the car, whereupon Oswald knew the jig was up because he was carrying a gun.

FWIW, in my teens in the 1960s I was stopped by police in Arizona a sufficiently embarrassing number of times that I had to provide an explanation to the State Bar when I became a lawyer in 1982. At no time did any officer approach me as though I might be a crazed killer.

[Watson Phillips]

Why is there any reason to think Tippit had any idea he was encountering an armed, cold-blooded killer? 

Who do you believe every cop in Dallas looking for at that moment ?

J." D. Tippit was one of the few officers in the Dallas Police Force not to be called to Dealey Plaza to help investigate the assassination. Instead, at 12.45 p.m. he was sent to the Oak Cliff section of Dallas."

[Tom Graves]

Who do you believe every cop in Dallas looking for at that moment ?

J." D. Tippit was one of the few officers in the Dallas Police Force not to be called to Dealey Plaza to help investigate the assassination. Instead, at 12.45 p.m. he was sent to the Oak Cliff section of Dallas."

You have a typo of omission in your question.