The trial next month of Karen Read, the Mansfield woman accused of murdering Boston police Officer John O’Keefe in January 2022, could take as long as six weeks.

“I’m just throwing at a dartboard, but based on what I know, if the Commonwealth’s case takes three to four weeks, I think our case would probably take two weeks,” Read defense attorney Alan Jackson said at a hearing Tuesday morning.

Prosecutors accuse Read, 44, of Mansfield, of backing her Lexus SUV into O’Keefe, her boyfriend of two years, and leaving him to die in the cold at the end of January 2022. Prosecutors say that taillight pieces were located in the area where O’Keefe’s body was found on the front lawn of 34 Fairview Road in Canton where Read and O’Keefe were supposed to meet up with others for an afterparty following a night of drinking at two bars downtown.

The defense has centered around a third-party culpability theory that alleges that then-owner of the 34 Fairview Road home Brian Albert, a fellow BPD officer, or others inside that home actually killed O’Keefe and that the investigators in the case have conducted a massive coverup to frame their client.

Read’s case is scheduled to go to trial on April 16.

The California-based Jackson was speaking from Zoom and fellow defense attorney David Yannetti was also absent from court for undisclosed reasons. The absence of both lead defense attorneys at Tuesday’s hearing did not please Judge Beverly Cannone.

“Counsel arguing these motions was to be present here in court today,” Cannone said after Jackson began speaking on what experts the defense may call at trial.

Tuesday’s hearing took place less than a week after the last motions hearing in the case. The sides are attempting to finalize the significant work going on in the background of the case that has become a media sensation. While Tuesday’s hearing lasted a mere 20 minutes or so, there was enough quibbling between the parties to fill a typical, much longer Read hearing.

When asked how much reciprocal discovery the defense had provided the prosecution, Assistant District Attorney Adam Lally said “Nothing. Absolutely nothing.”

Likewise, Talia Yannetti — attorney David Yannetti’s sister who works at the same firm — said that the defense would be happy to comply with discovery obligations when Lally and his team comply with their obligations first.

This is a developing story.