HARRIS COUNTY, Texas (KTRK) -- The Harris County Sheriff's Office says that investigators have found no evidence of a mechanical malfunction in the deadly Tesla crash that killed a grandmother inside a Katy home last week.

At this time, deputies say that they are still conducting an investigation to determine the cause of the crash that killed 71-year-old Martha Avila on June 19.

The crash happened in a typically quiet neighborhood near Fry Road while the Barbour family was preparing dinner.