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personpersonRobert AdelsonRobert AdelsonDonna Adelson's oldest son, a New York physician who testified for the State at her 2025 trial and was mentioned only in passing at the 2022 Magbanua retrial.← All People
Witness

Robert Adelson

Courtroom still of Robert Adelson.

Donna Adelson's oldest son, a New York physician who testified for the State at her 2025 trial and was mentioned only in passing at the 2022 Magbanua retrial.

207 lines·11 proceedings·6 mentions·2 trials

About

Robert Adelson, Donna Adelson’s son and Wendi Adelson’s oldest brother, was initially present in the record only through other witnesses’ descriptions of family relationships. Wendi identified him as a New York doctor from whom she was estranged and discussed the family’s initial objection to, and later reconciliation over, his marriage; another witness said Robert was rarely discussed. Robert later testified for the State at Donna’s trial, describing her as the family leader, characterizing her involvement in her adult children’s lives as controlling, and recounting her involvement in Wendi’s divorce. He also said Donna instructed him not to speak with law enforcement after Dan Markel’s killing and dismissed the significance of his having already spoken with the FBI. Cross-examination tested his firsthand knowledge through his infrequent visits and phone contact and elicited that Donna had attributed the advice to family friend and attorney Michael Weinstein.

Trial Record (11)

KMMagbanua RetrialMay 18, 2022 – May 27, 2022

Discussed in testimony as Wendi Adelson's oldest brother, a New York doctor from whom she was estranged; he did not appear or testify.

Day 2

Day 7

DADonna AdelsonAug 22, 2025 – Sep 4, 2025Called by prosecution

Testifying for the State on Day 2, Robert Adelson described Donna Adelson's role in the family, her involvement in Wendi Adelson's divorce, and their conversations after Dan Markel's killing. Cross-examination tested the scope of his firsthand knowledge and addressed the reported source of advice not to speak with police.

Day 2

DirectRobert Adelson - DirectRobert AdelsonSarah Kathryn Dugan3highlights192lines spoken

Summary

Robert Adelson described family dynamics, Donna Adelson's involvement in wendi Adelson's divorce, and reported post-murder conversations.

Highlights (3)

Quote“No. I think she had certain sort of rigid, fixed ideas or impressions for what she wanted for us, and if you went along with that, things were fine; if you didn't, things were not fine.”— Robert AdelsonRobert Adelson described his view of Donna Adelson's family expectations and control.Open in transcript →Watch this moment ▶
rulingThe court sustained the defense objection to a question about whether Donna Adelson was gullible or easily misled, while allowing inquiry into business operations and other personality traits within the ruling's limits.Open in transcript →
CrossRobert Adelson - CrossRobert AdelsonJackie L. Fulford2highlights15lines spoken

Summary

Robert Adelson described limited contact with Donna and agreed that police-contact advice was relayed through Michael Weinstein.

Highlights (2)

Quote“You know, probably less than once a week, maybe every other week, something like that.”— Robert AdelsonRobert Adelson described the limited frequency of his phone contact with Donna.Open in transcript →Watch this moment ▶

Day 6

Day 7

Day 9