SANTA ANA – A 5-year-old girl died and her sister and mother are in critical condition after a woman reportedly ran a red light, hitting the three pedestrians inside a marked crosswalk, Santa Ana Cpl. Anthony Bertagna said.

Police said Jessica Louise Cowan continued driving her Lexus, attempting to get away, before she was stopped by a driver who witnessed the crash.

Cowan, 33, was arrested on suspicion of felony hit-and-run, felony driving under the influence and manslaughter charges. Cowan’s driver’s license states her residence as Frazier Park, Bertagna said.

Osmara Mesa, a 5-year-old girl, died at the scene at 17th and Spurgeon streets. Osmara’s mother, reportedly 45, is in extremely critical condition with head trauma. Osmara’s 6-year-old sister also suffered head trauma and is in critical condition but expected to survive. Police have not released the names of the mother and 6-year-old daughter.

Bertagna said a preliminary investigation shows that Cowan was driving 60 mph or more while traveling westbound on 17th Street about 11 a.m. Saturday and ran over the family members, who were on their way to a store.

Cowan drove away from the crash but was followed by a woman in a vehicle who witnessed the collision, Bertagna said. The unidentified witness called police and cut off and trapped Cowan at Main and 17th streets, Bertagna said. A Santa Ana police squad car in the area arrived at the scene and arrested Cowan.

“Had this lady not had done this, we wouldn’t have this person in custody,” Bertagna said of the witness, who reportedly lives in the neighborhood. “We think she’s a hero. Who knows how many more people this woman would have hit?”

Cowan failed a field sobriety test at the scene and had a container of marijuana on her dashboard, Bertagna said.