Karen Read: New faces, familiar arguments on Day 1 of retrial

• Read faces the same three charges.

Why it matters: The first trial was a local fixation. The second is a national true-crime obsession.

What's new: This time around, special prosecutor Hank Brennan has replaced Norfolk County assistant district attorney Adam Lally as lead prosecutor.

• Instead of Read lawyer David Yannetti delivering opening statements, defense attorney Alan Jackson had the honors.
• The list of potential witnesses has doubled since the last trial, from 74 to nearly 150.

In his opening remarks, Brennan told jurors that Read said, "I hit him, I hit him, I hit him," at the scene of O'Keefe's death and claimed the couple's relationship was unraveling.

• Jackson is sticking to the argument that locked up the jury last time: that "O'Keefe did not die from being hit by a vehicle."
• The defense still claims the investigation into O'Keefe's death was "corrupted by bias, incompetence and deceit."

Between the lines: Judge Beverly Cannone has prohibited Read's defense from naming potential third-party culprits in opening statements, saying they can "develop the theory through relevant, competent evidence at trial."

By the numbers:

• 18 jurors, nine men and nine women, were selected.

• Judge Cannone estimated the trial should last six to eight weeks.
• The first witness of the retrial was Canton firefighter Timothy Nuttall.

What to watch: Jackson is likely to focus more this time around on former state trooper Michael Proctor, who led the investigation.

• Proctor's status has changed since the first trial: The top investigator was fired after sending sexist texts about Read.
• Jackson singled Proctor out as a "cancer" that infected the investigation.