Meredith Marie Lowell, 27, created a Facebook page and offered up to $850 for the hit, according to the FBI.
Lowell was looking to target random people outside a Cleveland library. As it turns out, the hit man Lowell tried to hire was an undercover FBI agent. Lowell offered the agent $730 in jewelry or cash for the killing of a victim of at least 12 years but "preferably 14 years old or older" outside a library near a playground in her hometown.
Lowell faces a hearing next Tuesday to determine whether she will be given the opportunity to post bail or be detained without bond pending resolution of the case.
Lowell has reportedly compared animal-welfare work to the liberation of World War II concentration camps.
The Associated Press contributed to this report.