One is accused of killing her boyfriend after a drunken spat. The other vanished without a trace, leaving her husband a murder suspect.

Both were investigated by the same Massachusetts state trooper whose on-the-job behavior led to his suspension without pay and an internal investigation into his conduct.

They are Karen Read, a former finance professional who is accused of hitting her Boston police officer boyfriend John O’Keefe with a Lexus SUV and leaving him to die in a snowstorm, and Ana Walshe, a jet-setting real estate executive who vanished on Jan. 1, 2023, allegedly due to foul play on behalf of her husband Brian Walshe.

Michael Proctor, an embattled investigator whose career could end in shame at the conclusion of a series of state disciplinary hearings, investigated both cases.

Officer John O’Keefe (Boston Police Department)

Walshe’s defense demanded prosecutors turn over all of Proctor’s texts in the new case.

A week after the hearing, Proctor appeared in front of a state trial board for a disciplinary hearing over his behavior in the Read case. The outcome has not yet been decided.

Brian and Ana Walshe on their wedding day in 2015. (Obtained by Fox News Digital)

Ana Walshe’s body hasn’t been found, but police accuse her husband of using their son’s iPad to make more than a dozen Google searches about how to dispose of human remains.

Read is due back in court on Feb. 18 for a motions hearing, and her new trial is scheduled for April 1.

Walshe’s trial is scheduled to begin on Oct. 20.

Fox News’ Mollie Markowitz contributed to this report.