A Millbury man who once ran the maintenance of Boston Public Schools’ bus fleet is charged with using his position to solicit and receive bribes — including a pickup truck and building materials for his vacation house — from vendors.

“What time we meeting and were [sic]? We can meet on pike at rest stop if that works. Also are u giving my whole half or half of what you have? I have today off and want to do some shopping so sooner would be great,” Michael Muller, who ran maintenance for BPS school buses, texted a vendor he was allegedly extorting for personal income.

Federal prosecutors charged Muller, 59, of Millbury, with five counts each of soliciting and accepting bribes as an agent of BPS, conspiring to commit bribery, and conspiring to commit honest services mail fraud, as well as f

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