Second police car at Tippit shooting?

More from Into the Nightmare:

"Dallas researcher Michael Brownlow interviewed Doris Holan, who lived directly across the street from the shooting, in a second-floor apartment at 409 East Tenth (researcher Bill Pulte accompanied Brownlow on one of his two interviews with Holan shortly before her death in 2000). She said that a police car had appeared in the driveway between the two houses (404 and 410 East Tenth) at the spot where Tippit was killed. Whether Tippit did so intentionally or coincidentally, he had blocked that driveway, which led to an alley at mid-block, parallel to both East Tenth and Jefferson Boulevard. Tippit, while driving eastward, may have been trying to use his squad car to prevent another police car from leaving the driveway. Holan said when she heard shots and looked out her window, the other police car was heading down the driveway approaching Tippit's vehicle.

... 'She saw a man leaving the scene, moving westward toward Patton... Near the (second) police car she also saw a man in the driveway walking toward the street, where Tippit's car was parked.' That man went up to where Tippit was lying, looked down to inspect the officer's head, and retreated back down the driveway, with the unidentified police car backing up at the same time to the alley. So Holan reported at least three suspicious men at the scene, including two men on foot and the driver of the second police car. Whoever killed Tippit may have fled in that car or in another vehicle or on foot through that alley adjacent to the shooting scene. And Tippit may have been shot by two men, a possibility the ballistics evidence, with different kinds of ammunition, might suggest, even though that evidence is unreliable. Most (not all) witnesses reported a man fleeing around the corner and up Patton toward Jefferson, which would be compatible with Holan's account.

...Michael Brownlow in 1970 found the other witness to the second police car, Sam Guinyard, a porter at a used-car lot at 501 East Jefferson who worked with Ted Calloway. Guinyard told the Commission that at the time of the shooting, he was standing 'at the  back (of the car lot), right at the alley back there' and about ten feet from Patton. Guinyard failed to mention the second police car when he gave that testimony...

(No further details about what Guinyard may have seen)

Frank Wright, who lived half a block east of the shooting, told reporter Earl Golz that he saw two men involved in the crime. But that was a belated addition to his earlier account of seeing one man drive off in a car. To Golz he mentioned another man fleeing on foot.

...independent researchers George and Patricia Nash ...in 1964... reported Wright telling them that after hearing the shots, he came out of his home at 501 East Tenth and saw Tippit hit the ground and roll over after being shot. Wright said he saw a man standing near Tippit, not holding a gun but wearing a  long coat (contrary to most other witnesses' description of a fleeing man wearing a light jacket), run away and drive off, alone, in a 'grey, little old coupe. It was about a 1950-51, maybe a Plymouth'.

There are four seemingly incompatible accounts:
1. The official version - light-coloured jerkin, unloading of shells, run south on Patton.
2. Acquilla Clemons - two gunmen, one 'kind of chunky' wearing 'khaki and a white shirt', running off in different directions.
3. Frank Wright - one gunman with 'long coat' who ran west on 10th, got into an old coupe and drove off.
4. The Doris Holans version.

I would add the account of Mrs. Ann McRavin, who lived at 404 East Tenth. McBride found her BBC narrative and she says, "I was standing at the window and I saw a man run by, and then there was a police car coming down the street and the policeman jumped out of the car, and just as he did the man turned around and shot him, and the man fell."

This is considerably different than Helen Markham's account of Tippit and his eventual killer having a "friendly conversation."