Hacker News Reader

Really interesting. I'm curious as to how they knew precisely the timeframe Aeillo was with his stepdaughter.

"...it recorded her heart rate slowing rapidly, and stopping at 3:28 p.m., about five minutes before Mr. Aiello left the house, the report said."

View on HN

Seems like some camera footage corroborated the fitbit data.

"the police said their investigation used a combination of video surveillance and data from Ms. Navarra’s Fitbit, an Alta HR device"

They had access to security cameras on the property, that's when they realized Aeillo's car was still there at the time of his stepdaughter's death. So guessing they saw the car leave on the camera.

Reply on news.ycombinator.com