A 29-year-old Dallas attorney, Emma Hackney, was killed Sunday evening in a violent crash in Uptown that police say was caused by an allegedly impaired driver traveling at high speed. The collision, which occurred at the intersection of Cedar Springs Road and Turtle Creek Boulevard, has renewed concerns about dangerous driving in the neighborhood. According to an arrest affidavit, officers believe 26-year-old Preston Petty was under the influence of alcohol or drugs when he lost control of his 2025 Tesla Model Y while speeding southbound. A witness reported seeing the vehicle take a curve too fast, strike several trees and…