I don't trust my memory on this, sorry, but maybe someone else can pin down who and when Mark was told. It sounds like Sandra told him what she knew, but she had limited knowledge at that point. Perhaps she knew TS was dead, but not murdered. The wording makes it hard to determine.
The 2015 article says:
"The phone rang. The girl in the front office picked it up and said there's crime tape. Her block is taped off, and there's police everywhere," said Hoskins."
"Hoskins immediately drove to the doctor's home and spoke with a deputy".
"He said she's passed," said Hoskins. "I called Mark, and I said I know what's going, but I don't know what's going on. He was hysterical."
"I said where are you. He said I'm on my way home. I said Mark I'm headed back to the office to take care of things."
"That's exactly what Hoskins did..."
Colleague of murdered Bonita Springs doctor speaks out