A large aperture, five element cosmic ray telescope was operated in conjunction with an air shower array in a search for long lived particles, delayed between 1 and 45 μs after extensive air showers. After sampling ~ 29 000 air showers with an energy greater than ~ 1014 eV, over a period of 9 months, an excess of 11 such events were observed with time delays in the interval of 1 to 6 μs following the showers. The events in the remainder of the 45 μs interval were consistent with background random coincidences. We estimate that only 1 of the 11 excess events might be attributable to afterpulsing in our telescope photomultiplier tubes. All the excess 'trailing particle' events can be explained as being due to electrons resulting from shower associated muons that stop and decay in the vicinity of the cosmic ray telescope.