The McHenry County Coroner said Monday that 22-year-old Jennifer Fernandez's blood alcohol level was 0.164, twice the legal limit. No other drugs were found in her system.
Note: The video in the player above is from a related report.
The Dobosz family, of Rolling Meadows, was on their way to a summer vacation in Minnesota when the crash occurred early on July 31. Investigators said Fernandez was behind the wheel of an Acura going the wrong way on Interstate 90 in McHenry County and collided with the Dobosz family's van.
SEE MORE: Father dies days after wrong-way I-90 crash in Hampshire that killed 7, including wife, children
Both cars erupted in flames, killing Fernandez and all six members of the Dobosz family. A 13-year-old friend traveling with them was also killed.
News of the crash devastated the Oriole Park Falcons football and cheer community, where the couple was heavily involved.
SEE MORE: Family, friends remember 13-year-old girl among 8 killed in I-90 wrong-way crash in McHenry County