A crash reconstructionist returned to the stand in Karen Read’s murder trial Monday, the proceeding’s 29th day, as her defense prepares to rest its case this week.

She is accused of killing her boyfriend, Boston Police Officer John O’Keefe, by clipping him with her 2021 Lexus LX 570 SUV on Jan. 29, 2022, and leaving him to die on the ground in a record-setting blizzard.

Before jurors arrived, Judge Beverly Cannone heard motions regarding rebuttal testimony and to preclude or limit expert witnesses.

She said she would hold an additional evidentiary hearing to determine what Dr. Elizabeth Laposata, a Rhode Island forensic pathologist and professor at Brown University, can testify in front of jurors.

Her defense maintains that her vehicle never struck O’Keefe and that his injuries were caused in some other manner after she left.

Read could face life in prison if convicted of the top charge. Jurors deadlocked at her first trial last year on the same charges.