Danville (9-3, 3-1 45th District) scored 33 points off those turnovers.
"When they pressured us, our guards were impatient," Casey coach Randy Salyers said. "Instead of waiting for it clear out some, we played out of control."
Casey (6-8, 3-2) was in the game, trailing only 13-12 near the end of the first quarter. But the Admirals closed out the period with 10 straight points to lead 23-12 going into the second quarter, then outscored Casey 17-7 in that period.
"That run is just a confidence builder," Schommer said. "They were up 28-5 after one quarter on us last year up here, and we don't forget."
The second half didn't go any better for Casey, as Jackson scored nine more points in the third quarter and Danville went up 57-34. The lead grew to 25 in the fourth quarter.
Casey may have received even worse news when Beth Patterson went to the floor after bumping knees with Jackson with 2:33 to play.
Patterson was helped off the floor, but Salyers said a trainer said it was likely just a bruised kneecap, and Salyers said he expects her to miss no more than two weeks. She'll become the fifth Casey starter to miss time this season.
Monica Vonderbrink had 14 points and Shatoniah Miller added 12. Vonderbrink, Jackson and Chiu each had seven rebounds to lead Danville to a 38-37 rebounding advantage.
Danville hit 26 of 58 shots for 44.8 percent.
Patterson had 23 and Meagan Murphy 14 for Casey, and the Rebels didn't get a point from a bench player until Bethany Snow's basket with 2:12 to play.
Casey finished the game 22-for-50 (44 percent), but hit only eight of 21 free throws (38.1 percent).
DANVILLE (9-3) - Renee Chiu 7, Monica Vonderbrink 14, Shatoniah Miller 12, Xerces Simpson 3, Krystal Jackson 30, Tasha Milby 2, Callie Harper 3.
CASEY (6-8) - Lindsey Hoskins 4, Tara Weddle 2, Lindsay Wilson 2, Ellen Hogue 2, Beth Patterson 23, Bethany Snow 4, Meagan Murphy 14.