Missing DWI Video

Texas law requires a county like the size of Harris is required to videotape anyone that is arrested for DWI.  Most agencies usually leave their tape with the District's Office within the week of the arrest.  Commonly, DPS takes much longer to drop off the tape.  In my practice I have waited over a month to see a video made by DPS. 

Lately, I have had cases where the arresting officer does not drop off a video tape.  When that happens the prosecutor has to make a decision whether to dismiss the DWI case or proceed to trial knowing that I will get an instruction for the jury letting them know that the police officer was required to make a video tape of the field sobriety tests.  Luckily, I have come across reasonable prosecutors that have dismissed the DWI case when the video tape can not be found.  I wonder if there is a reason this is happening and will it continue?