Thank you. I can't find one corroborating account of this now legendary NDE; all accounts trace back to what Kimberly Clarke said. Do you know of any?
What do you mean by corroborating account?
The incident is detailed in the online PSI Encylopedia as follows:
Tennis Shoe
Kenneth Ring and Evelyn Elsaesser Valarino discuss the 1977 case of a US migrant worker named Maria, who was admitted to the cardiac ward of Harborview Medical Center in Seattle following a heart attack.
6 Three days later Maria had a second attack. She experienced an OBE, during which she observed her resuscitation from above and saw how printouts spilled out of the machines that were monitoring her bodily functions and onto the floor, even ending up under her bed. Amongst other things, she saw a man’s left tennis shoe located on a ledge outside a window on the third floor.
Following her resuscitation Maria described her OBE, including the appearance and location of the shoe, to a social worker, Kimberly Clark Sharp, with the help of gestures and facial expressions, as she spoke little English. She told Sharp that the tennis shoe was dark blue, that the material was worn over the little toe, and that one lace end was tucked under the heel, and asked Sharp to look for it in order to confirm her experience. Sharp finally found the shoe and retrieved it from the window ledge, finding Maria’s description to be correct.
Sceptical investigators Hayden Ebbern, Sean Mulligan, and Barry L Beyerstein had later argued that Maria could have obtained the information in a normal manner, picking up certain details consciously or unconsciously, such as by overhearing hospital personnel discussing the shoe, guessing other details.
7 Sharp pointed out that Maria spoke very little English, certainly not at the level that would have been required to comprehend the details of such discussion, and other details contradicting the sceptics’ claims.
8
The source footnotes 6, 7 and 8 are listed as "