Prosecutors in the case against accused Aurora movie theater killer James Holmes are seeking to charge Holmes with an additional 14 counts of attempted murder, according to a new court filing.

In motions filed Tuesday, prosecutors are seeking to add the new counts of attempted first-degree murder and also amend five existing counts against Holmes. If the motions are approved, they would bring the total number of counts facing Holmes to 166.

The revelation was one of several to come in newly available court documents Wednesday.

In other filings:

• Holmes’ defense attorneys announced they have abandoned their efforts to sanction the prosecution over the release of a new mug shot of Holmes.

• Prosecutors argued a different defense filing accusing them of leaking information to the media is too vague to respond to.

• Prosecutors said they have shared more than 18,000 pages of investigation documents, along with 99 CDs and 210 DVDs, with the defense team but cast doubt on whether the case is ready for the crucial preliminary hearing currently scheduled to begin Nov. 13.

Prosecutors said Aurora detectives are still receiving thousands of pages of information — much of it medical records of shooting victims — and are working exhaustively to process that information.

“[B]ut when asked by the District Attorney, (the detectives) indicated that they are not certain they they will be able to provide these files sufficiently in advance of the preliminary hearing date in November to be of use to counsel in preparing for the preliminary hearing,” prosecutor Rich Orman wrote in the filing.

The preliminary hearing is important because it would be the first time evidence against Holmes is unveiled in a public court hearing — after which the judge would determine whether there is enough evidence for the case to go forward. At a hearing scheduled for Thursday morning, prosecutors and defense attorneys are expected to discuss whether they are prepared to hold the preliminary hearing in November or whether it should be pushed back to December or later.

Also at that Thursday hearing, the sides were set to debate a request by the defense for sanctions over the release of Holmes’ new mug shot. Defense attorneys made the request last week, saying that releasing the new mug shot of Holmes — which shows him with closely cropped brown hair instead of the brightly colored orange hair of his initial booking mug shot — violated the judge’s gag order in the case.

But defense attorneys said in a Tuesday court filing that they talked with officials at the Arapahoe County Sheriff’s office — which is responsible for Holmes’ detention in its jail — and are no longer pursuing their complaint about the photo’s release. Their previous request for sanctions, the attorneys wrote, “has been rendered moot.”

Still pending, though, is a separate defense complaint that law enforcement officials leaked information to the media about a notebook Holmes mailed to his psychiatrist.

In their response, made available Wednesday, prosecutors said the defense motion fails to identify the individual they claim violated a judge’s gag order or which statements they believe were made to the press. Prosecutors also argued that the defense did not specify what evidence they have received that supports a claim of leaked information.

Holmes is accused of killing 12 people and injuring another 58 after he opened fire in a packed Aurora movie theater July 20.

Holmes currently faces 24 counts of first-degree murder — two different types of murder charges for each victim — 126 counts of attempted first-degree murder, one count of possession of an explosive device and one sentence-enhancement count for allegedly committing a crime of violence.

Jordan Steffen: 303-954-1794, jsteffen@denverpost.com or twitter.com/jsteffendp