Incorrect. The crime was committed in Los Angeles County, the trial was held in Los Angeles County.
The Prosecution generally (and I have not conducted a state by state fact check) can not move for a change of venue. CA permits it, but only for this reason:
Penal Code 1033:
(b) On its own motion or on motion of any party, to an adjoining county when it appears as a result of the exhaustion of all of the jury panels called that it will be impossible to secure a jury to try
the cause in the county.

