HOUSTON, Texas (KTRK) — Tywana Gilford Mason is the fifth and final person charged in what Harris County prosecutors say is a teacher certification scandal that spanned several years.

According to court documents, Mason used his Houston Training and Education Center role to screen teacher candidates for the certification test and then let them go.

READ THE ORIGINAL: 5 people charged in alleged teacher certification scam, Harris County DA says

Police say she then allowed a man identified as Nicholas Newton, an assistant principal at Booker T. Washington High School, to take the test on her behalf.

According to court documents, she was bribed and paid about $125,000 by Vincent Grayson, the basketball coach at the same school, also known as “Kingpin.”

“He made $1.9 million from this scheme as best we can tell. It’s almost certain there’s more than that because there’s cash and it’s harder to track,” said Mike Levine, a felony chief in the Public Corruption Division of the DA’s office.

Court documents say this happened more than 400 times and mostly involved prospective teachers in the Dallas area.

Grayson is one of three HISD educators who are part of this ring.

“We will terminate any teacher who fraudulently passed the test and will work to ensure that a highly qualified teacher takes their place,” said Alexandra Elizondo, chief of public affairs and communications for the Houston Independent School District.

Mason is charged with engaging in organized criminal activity.

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