The 39-year-old was last seen on October 17 at the match.
Timeline shows missing mom Heidi Planck's final movements
Suzanne Smeader, Heidi Planck’s mother, told DailyMail.com it was unusual for Heidi to disappear without any explanation.
In her last conversation with her daughter, Smeader said she got no indication that there was anything wrong. She said she was 'leaning toward her employment' as one possible link that could explain her disappearance.
‘It's bizarre, it's so unlike her...People don't just go missing like that, you know,’ she said from her home in Cheektowaga, New York, which is located some 10 miles east of Buffalo.
‘I just can't imagine. I just feel for her son and I just can't imagine what that poor little kid is going through being without his mom,’ Smeader said.
Heidi Planck's mother says her daughter was making plans to see her at Thanksgiving | Daily Mail Online