By Joan Murray

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PEMBROKE PINES (CBSMiami) – As Pembroke Pines crime scene techs spent hours going through her home Thursday, neighbors say 86-year-old Marilyn Ormiston was a quiet woman who spent decades working as a school crossing guard.

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Police say they have charged 57-year-old Robert Ormiston with premeditated murder in her death.

Neighbors identified him as her son, police say.

A 911 call came in late Wednesday night. When they arrived at the home on SW 8th Street they say they found the woman severely injured. She died at the hospital.

“She was a very sweet loving lady,” remembers neighbor Judy Goodwin.

Goodwin remembers when Marilyn, her husband, and kids moved into the house some fifty years ago.

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Marilyn worked as a crossing guard on the corner of 9th and SW 68th Blvd.

“All the children knew her,” she said.

The guard who replaced Marilyn met her for the first time this week. She says Marilyn and her son were walking the dog and stopped to chat.

“The guy seemed nice but disoriented. He was concerned about his mother.”

She is disturbed it would be the last time she saw Marilyn alive.

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“I don’t feel good about it is really sad.”