Investigators say they also made a video showing the laxative pills being mixed into the cookie batter.
The strike in the Claymont School District in Tuscarawas (tus-kuh-RAH’-wus) County is in its third week.
Authorities say Bo Cosens and Rachel Sharrock appeared in court Tuesday to face several charges.
Sharrock’s attorney declined to comment Friday. Court records didn’t list an attorney for Cosens.