Cops: Grandma Phones Bomb Threat to School

Officials accused a 51-year-old San Antonio grandmother of phoning a bomb threat to an elementary school that wouldn't let her visit her grandchildren.

Velma Gladys Brewster was freed on bond Friday after being charged with making a terrorist threat to Windcrest Elementary School.

More than 700 students and faculty members evacuated the campus Thursday after school officials received a threatening voicemail.

No explosives were found.

A phone message left at Brewster's home Friday was not returned, the San Antonio Express-News reported.

Police said Brewster didn't have permission from her daughter to visit her grandchildren at the school.

Yesterday CBS Affiliate KENS reported investigators said they had a good idea of who was behind the threat, the suspect's motivation for making the threat appearing to stem from a family dispute, and possibly a custody battle.

KENS also reported that on Wednesday the school issued a criminal trespassing warning to a woman, but investigators would not confirm if she was the same person they believe behind the bomb threat.