1987

November: Lynn DeWolfe is convicted of drunken driving in Natick.

1990

February: DeWolfe’s license is reinstated.

2005

November: DeWolfe’s second drunken driving conviction in Medway.

2015

May: DeWolfe’s license is reinstated and she is entered in the ignition interlock device program for two years. It requires her to blow into the device, which will prevent her car from starting if she consumes alcohol, but does not detect drugs.

2017

Jan. 25: DeWolfe fails a random retest while driving when the ignition interlock device showed she had a blood alcohol concentration of 0.029

March 16: DeWolfe fails two startups, as the ignition interlock device detects a blood alcohol concentration level of 0.043, then 0.033 a half-hour later, triggering a violation hearing with the Registry of Motor Vehicles.

May 10: DeWolfe has a failed startup at 9:35 a.m., showing a blood alcohol concentration of 0.142.

June 20:

10:45 a.m.: While on her way to a Registry of Motor Vehicles hearing about her March violation, DeWolfe collides with a motorcycle on Interstate 95 North, Exit 35, in Woburn. The other driver, 21-year-old Brandon Egan, is taken to Lahey Hospital & Medical Center with serious injuries, according to a suit filed later. No citations are issued, the Registry is not notified, and DeWolfe drives away.

11:30 a.m.: DeWolfe attends the Registry hearing. Her participation in the ignition interlock device program is extended to Sept. 10.

Aug. 24

Prior to 8:27 a.m.: A 911 caller gives State Police DeWolfe’s plate number and a description of her car and says she was driving erratically on Route 3 southbound in Chelmsford and appeared to be “on some sort of drugs’’ as her head bobbed up and down. Trooper Michael Benevento didn’t broadcast the call.

8:55 a.m.: DeWolfe crashes into the rear of another car on Route 3 South, north of Exit 25 in Burlington. The other motorist calls 911 and reports DeWolfe appears “out of it.’’

9:01 a.m.: State Trooper Daniel Hanafin arrives on the scene, and Benevento texts him that a 911 caller previously reported that DeWolfe was driving erratically.

9:14 a.m.: Hanafin clears the scene after concluding DeWolfe is not impaired. She says she got lost on her way to Hampton Beach, N.H., asks the trooper for directions, and drives away.

9:33 a.m.: DeWolfe allegedly crashes into a car, causing it to strike a Jersey barrier, spin around toward oncoming traffic, and careen into a motorcycle and two other cars on Interstate 95 northbound in Reading. The motorcyclist, 42-year-old Christopher Weisz, is killed. DeWolfe keeps driving.

9:50 a.m.: A trooper responds to 911 calls that DeWolfe is driving erratically and has hit two more cars and locates her, crashed into the median on Interstate 95 North at Exit 38 in Wakefield.