According to the police tapes, the first ambulance arrived at 1:18. It was dispatched from the Dudley-Hughes Funeral Home, two blocks away. George and Patricia Nash saw the time slip notifying of the dispatch and noted that it was time-stamped 1:18.
http://www.kenrahn.com/JFK/History/WC_Period/Reactions_to_Warren_Report/Support_from_center/The_other_witnesses--Nashes.html
The Dudley M. Hughes Funeral Home is the central ambulance dispatching point for southern Dallas. It either handles calls directly or calls other funeral homes in the system that cover other areas. Dudley M. Hughes Jr., the dispatcher, took the call from the police. He filled out an ambulance call slip with the code 3-19 (which means emergency shooting) and the address, 501 East 10th Street. He put the slip into the time clock and stamped it 1:18 p.m., November 22, in the space marked Time Called. Since the location was just two short blocks away he told one of his own drivers, Clayton Butler, to respond. Butler and Eddie Kinsley ran down the steps, got into the ambulance and took off, siren screaming.
Butler radioed his arrival at the scene at 1:18 p.m., within 60 seconds of leaving the funeral home. He remembers that there were at least 10 people standing around the man lying on the ground. It was not until he and his assistant pulled back a blanket covering Tippit that they realized the victim was a policeman.
Astounding hypocriscy.
According to LNs Markham's clock was wrong, Bowley's watch was wrong, Methodist Hospital clocks were wrong, but the clocks used by DPD Dispatchers (which their own man in charge, J.C. Bowles said were not synchronized and did not give real time) and the clock used by Dudley M. Hughes Funeral Home worked perfectly and were spot on.
No time stamped slip of the Funeral Home has ever been found. It doesn't exist. And nowhere in the article written by George and Patricia Nash does it say they actually saw the time slip.