Halton Children's Aid Society (CAS) workers failed to document important information and didn't investigate red flags related to the condition of two boys in a Burlington, Ont., couple’s care, a defence lawyer told the women's murder trial.

Nabeel Sheiban cross-examined retired child protection worker Lisa Potts on Friday, asking about various notes recorded by adoption workers and their correspondence with Becky Hamber, his client, and Brandy Cooney.

In one message read by Sheiban, Hamber said the older boy was “unhealthy” and had an eating disorder.

“It should be a red flag, but I can’t speak as to why it wasn’t,” Potts said.

“It is obvious [he] is underweight and does not look healthy,” Sheiban said in quoting Hamber. The lawyer then argued: “This should have been a red flag.”

“Yes

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