A surprise turn of events in the Grape Street double homicide trial Wednesday, as prosecutors say they were set and prepared to call their 19th witness in their case against 26-year-old Kenyatta Austin.

The prosecution team of Colleen Curtin-Gable and Ashley Morgan walked into court Wednesday and told Judge Kenneth Case they had anticipated one witness this afternoon but for various reasons, that person will not be testifying.

There is no official word on who that witness was, their connection to the case, or nature of their testimony.

When prosecutors were asked if they anticipated the witness to testify Thursday, Spectrum News was told to stay tuned, while defense attorney James Auricchio said it wouldn't be prudent for him to comment.

Austin stands accused of shooting four people, killing two, including 56-year-old Yvette Johnson and her toddler grandson Kyrie Johnson outside the family's Grape Street home in the early morning of July 2, 2018.

In a videotaped statement to police, Austin denied having any involvement in the shooting and says he was home in Niagara Falls at the time.

Proceedings resume Thursday morning in the non-jury trial.