The Vanishing of Erin ‘Portia’ McGonigal

2025-02-16

The Vanishing of Erin ‘Portia’ McGonigal She was planning a fresh start. But before she could leave, she vanished. On October 6, 2015, Erin McGonigal, also known as Portia Devine, Portia Elizabeth Westendorp, or Erin Irene Mattar, was preparing to move out of her Mississauga home. A social media-savvy model, dancer, and entrepreneur, Erin was always connected—until she wasn’t. She never packed her truck. She never picked up her phone. She was never seen again. Her sudden silence was the first red flag. But the rea...

The Vanishing of Erin ‘Portia’ McGonigal She was planning a fresh start. But before she could leave, she vanished.

On October 6, 2015, Erin McGonigal, also known as Portia Devine, Portia Elizabeth Westendorp, or Erin Irene Mattar, was preparing to move out of her Mississauga home. A social media-savvy model, dancer, and entrepreneur, Erin was always connected—until she wasn’t.

She never packed her truck. She never picked up her phone. She was never seen again.

Her sudden silence was the first red flag. But the real mystery? It took 49 days before anyone officially reported her missing—and it wasn’t her husband or family who did. It was three friends, troubled by her disappearance and determined to get answers.

What happened in those missing weeks? Why did stories change? And why does it feel like no one—not even law enforcement—has all the answers?

From the creators of Ontario Cold Cases – Canada’s True Crime Podcast comes a chilling investigation into one of Ontario’s most unsettling disappearances. Filled with contradictions, unanswered questions, and a trail that has gone ice-cold, The Vanishing of Erin ‘Portia’ McGonigal examines a case that still haunts those who knew her.

Because someone out there knows the truth.

And it’s time to bring Erin home.

Subscribe now on Apple Podcasts, Spotify, Amazon Music, or wherever you get your podcasts.

And remember: every case deserves answers. Every missing person deserves justice.

Someone out there knows what happened to Erin. Could it be you?

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