MOUNT CLEMENS, Mich. — A Detroit woman has been sentenced after admitting she made a false bomb threat targeting Lake Shore High School, prompting a massive emergency response and evacuation.
Crystal Royster, 42, of Detroit, was sentenced Thursday, January 8, 2026, by Michael E. Servitto in Macomb County Circuit Court after pleading guilty to False Report or Threat of a Bomb, a 4-year felony. Royster entered her guilty plea on November 13, 2025.
Judge Servitto sentenced Royster to 18 months of probation, with the first 14 days to be served in the Macomb County Jail, receiving credit for 3 days already served. As part of her probation, Royster is prohibited from contacting the victims, must notify the school prior to any contact with school grounds, and is required to complete a Class A impulse control course.
According to prosecutors, the incident occurred on March 12, 2025, when Royster made two false bomb threat calls involving Lake Shore High School in St. Clair Shores. Authorities say the threats were made after Royster’s daughter was not allowed to participate in a school play due to illness earlier that day, consistent with school policy.
The threats led to the evacuation of more than 700 people. St. Clair Shores Police Department, along with multiple assisting agencies, conducted a full sweep of the building. No explosives were found.
“The defendant was sentenced today for making a false bomb report that resulted in a significant emergency response,” said Peter J. Lucido. “While the court determined that probation was the appropriate outcome, her actions nonetheless caused disruption and concern within the community.”