The first had the headline: Dismay in Nation -- Negroes Urge Others to Carry on Spirit of Non-Violence.
This article quoted every major African American in America at the time. NAACP, NUL, Jackie Robinson, a negro psychologist, a negro senator, as well as some other public notables such as Richard Nixon and the Gov. of Texas.
The article did a good job of getting lots of quotes and information into it but I was surprised to see that there were no details of the actual shooting or the investigation. Even though there could have been other articles that covered the details it is odd that there was no mention of anything in the article. Also there were no quotes or information from the police or the King family. It seems like that would be a logical addition more than Jackie Robinson.
The second article: A Convict Says Ray Sought Bounty
This article starts to answer the questions of who could have killed King. There was information from an inmate and police follow up. I did feel that the article, like the first, lacked information about the shooting and how to get information to police. The article came out relatively soon after the shooting and there weren't any new details released about autopsy or investigation or anything except the word of this inmate. It is also lacking last known whereabouts of the suspect. It was really just a blurb and left me with more questions than answers.
The third article was Guns and Assassins
This article pulls together the information on RFK, JFK, and MLK's killers and where they are in prosecution. While it gives information as to how the police and courts are coming along in the trial process but don't quote the DA's or the families. It is largely un-sourced information.
I was greatly surprised by the lack of information given in all three of these articles. Even when most people would know a great deal about the event, there must have been a way for them to package the general info into the articles so that they all had more context -- especially for the NYT and their status as a historical publication.