On Thursday, Debra Slaymaker-Walker was charged with two counts of homicide and other charges stemming from an Oct. 26 crash that left two Warwick High School students dead and a third seriously injured.

Lancaster County District Attorney Craig Stedman held a press conference Thursday morning to discuss the charges against the 63-year-old Mount Joy woman.

She faces two counts each of criminal homicide, homicide by vehicle and involuntary manslaughter. She's also charged with one count each of aggravated assault, aggravated assault by vehicle, simple assault, an accident involving damage to an attended vehicle or property, recklessly endangering another person, exceeding the maximum established speed limit by 52 miles per hour, reckless driving, failure to drive at a safe speed and fleeing or attempting to elude a police officer, according to court documents.

WATCH: DA details homicide charges against driver in crash that killed two Warwick students

Below is a timeline of events from when police were dispatched to the chain-reaction crash. You can see the timeline in the interactive map at the top of this story.

3:12 p.m., Friday, Oct. 26: Northern Lancaster County Regional Police dispatched for a "reckless driver" on Temperance Hill Road near the intersection with West Lexington Road in Penn Township. 

3:17 p.m.: Officer arrives in the area, locates the vehicle and activates lights and siren in an attempt to stop the motorist, Debra Slaymaker-Walker. 

3:18 p.m: Officer complies with orders to cease pursuit after Slaymaker-Walker fails to yield near the intersection of Temperance Hill and Longenecker roads in Warwick Township.

3:18 p.m: Slaymaker-Walker's vehicle strikes occupied school bus at West Orange Street and Green Acre Road. 

3:18 p.m: Slaymaker-Walker takes action to avoid striking Lititz Borough Police car on West Orange Street in front of Lititz Church of the Brethren in Lititz Borough.

3:19 p.m: Slaymaker-Walker travels past Warwick High School on West Orange Street and strikes a minivan, which begins the chain-reaction crash that leaves two high school students dead.

Lancaster County DA to announce 'major development' in investigation of October crash that killed 2 Warwick students