'Not just politics': How the 2020 campaign is dividing Houston's booming suburbs

This summer, Whitney Hanzik got a startling notification on her phone. There'd been a stabbing near her home, and one person was injured. Then she looked outside and noticed a helicopter flying over her suburban Houston neighborhood.

Hanzik, a 35-year-old mom who home-schools her three children, wanted to know whether a dangerous person was on the loose. So she logged on to the Prestonwood Forest Neighbors & Friends Facebook group.

"Can anyone verify or does anyone have any further details?" she posted, along with a picture of the crime alert.

Hanzik, who'd grown up in Prestonwood Forest and moved back as an adult, didn't expect the firestorm that followed.