A woman is dead after a Tesla crashed into a home in Katy, Texas, with the vehicle's driver-assistance system reportedly engaged at the time.

According to Engadget, the Tesla had "an automated driving assistance system" active when it struck the house, killing one woman inside.

Ars Technica reports that the crash was captured by a doorbell camera and that the victim was a grandmother who died in her own home. Ars Technica also notes a jarring detail of timing: Tesla publicly touted Autopilot as lifesaving just a day after the woman was killed in the crash.

The two accounts together describe the same event — a Tesla running a driver-assistance feature leaving the road and crashing into a residence, with fatal consequences for someone who was not in any vehicle at all.

The sources do not specify the exact name or version of the system that was engaged, what the driver was doing at the time, the speed of the vehicle, or whether any investigation has reached conclusions about the cause. Those details are not established in the available reporting.

Why it matters: Driver-assistance systems are marketed heavily on their safety benefits, but this crash is a reminder that when the technology fails or is misused, the people harmed can include bystanders in their own homes — not just the driver who chose to switch it on.