ARCCA tested a direct impact at 29 mph and found the exemplar SUV’s back window shattered and the vehicle sustained more severe damage to its rear than Read’s had.

Special prosecutor Hank Brennan drills ARCCA crash analyst Daniel Wolfe during the murder retrial of Karen Read in Norfolk Superior Court. – Pat Greenhouse/Boston Globe Staff With jurors gone ...

ARCCA performed a series of tests using an exemplar Lexus and a test arm positioned how the prosecution’s accident reconstruction expert, Judson Welcher, concluded O’Keefe’s arm was oriented.

He said ARCCA could only turn over the final report that he testified to in the first trial and that all the “raw data” was classified by the federal government.

When WBZ asked Jackson outside court February 18 what the judge's concerns were about, Jackson said he had "no idea" and also denied paying the ARCCA experts to testify at Read's first trial.

He said ARCCA was asked to determine if the damage to Read’s SUV was consistent with O’Keefe’s injuries. Wolfe and two other experts reviewed numerous materials including an autopsy report, ...

ARCCA was hired as part of the now-closed federal investigation into how police handled Read's case. Rentschler began by going over his credentials and what ARCCA does.

The witnesses are crash reconstructionists from ARCCA Inc. Daniel Wolfe and Andrew Rentschler from the engineering and crash reconstruction firm ARCCA were hired by the Department of Justice as ...

Cannone did not rule on whether ARCCA can testify as to any new conclusions. What exactly prompted the government to retain ARCCA for a federal investigation into O’Keefe’s death remains unclear.

In June, Wolfe sent Jackson another note discussing his upcoming testimony before the jury, according to Brennan. “And then a bill [is also sent] from ARCCA to the defense for $23,925 ...

ARCCA used a Lexus SUV that is the same year, make and model of the one Read was driving on the night of O’Keefe’s arm and performed “full-scale vehicle testing.” ...