Hersevoort, 58, of Dublin was hit as she was bicycling with her husband that Sunday morning on Foothill Road near Golden Eagle Way.
The case now heads to the Alameda County District Attorney's Office, which will decide whether to file charges against Hall in the death.
Police Capt. Craig Eicher said Pleasanton police had completed their work, which included the accident analysis, and were just waiting for information including blood work from Hall, which they received Tuesday.
"We're ready to move forward. We were just waiting for the reports because the D.A. won't move forward without them," Eicher said.
The wait of just over a month is pretty typical when it comes to getting information from the Alameda County Crime lab, Eicher said.
"I know they're pretty busy," he said. "I think because of TV, people think it happens overnight."
Updated information on charges against Hall, if any, will be posted at the Pleasanton Weekly website.
Meanwhile, the 18-year-old's father, Aaron Hall, was arraigned in Pleasanton Superior Court on Wednesday and pleaded not guilty to felony weapons charges stemming from the case.
He was charged after police said they discovered two illegal assault rifles and "thousands of rounds of ammunition" in a gun safe at the Halls' home in the 4200 block of Echo Court.
The gun safe was found when police served a search warrant looking for evidence in their vehicular manslaughter investigation involving Cody Hall.
Aaron Hall was charged with possession of a firearm by a convicted felon, possession of an assault weapon, possession of ammunition by a felon, and possession of a non-narcotic controlled substance. Police said they found four Daytrana patches, a stimulant used to treat ADHD that Aaron Hall had without a prescription.
The D.A.'s Office filed felony charges and officers obtained a $640,000 arrest warrant for Aaron Hall, who turned himself in July 13; he was released the same day after posting a reduced bond of $265,000.
Aaron had two felony convictions from 1994 for assault with a deadly weapon and firing at an inhabited dwelling. A pretrial hearing on the new charges has been set for Aug. 28.