SACRAMENTO (CBS13/AP) — Two former employees of the Sacramento Public Library and the wife of one of them have been found guilty of corruption related to a contract for building maintenance.

Prosecutors said James Mayle, 66, and his wife, Janie Rankins-Mayle, 63, were convicted Monday of grand theft and bribery by a Sacramento County jury. James Mayle, the library’s former security director, also was convicted of criminal conflict of interest.

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A separate jury previously convicted Dennis Nilsson, 65, the library’s former maintenance supervisor, of 16 counts of grand theft, bribery and conflict of interest.

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Prosecutors say the company owned by Rankins-Mayle overcharged the library for building maintenance. An investigation found the $1.3 million in payments from 2004 to 2007 should have been about half that amount. Nilsson was paid by Mayle and Rankins-Mayle more than $100,000 in bribes for approving the invoices.

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Nilsson and Mayle were convicted of directing contracts to Mayle’s wife. Sentencing for all three will be Jan. 20 and all are expected to be sent to prison.