Eskridge never bothered to take the rape kit to the lab in 1980 for analysis.  It sat in the property room for four years until Ewing's arrest in 1984.  Eskridge then personally drove the unprotected rape kit, together with Ewing's samples, to the lab.  After doing so he wrote the above report in September of 1984.

On the date of the Jensen Preliminary Hearing (11/02/84) blood typing results had not yet been reported by the crime lab. Nonetheless, Jensen gave testimony that she already knew those results and that there "was a match." (Recall that Eskridge drove an unprotected, unsealed rape kit to the lab.   On the same trip he had fluid samples from Ewing).

On 11/15/84 (14 days after the Jensen Preliminary Hearing) the Lab reported:
The possible donors of the semen found on the vaginal swab, assuming one donor, are as follows: 1) B Secretor; 2) AB Secretor.  Ewing is a B secretor.  Jensen is an A secretor.  The blood type of Jensen's boyfriend is unknown.  The defense has presented the theory that Eskridge took the opportunity to contaminate the rape kit.