(UPDATED) Check out Texas Watchdog Tuesday morning soon for the next installment of our investigation into the city airport system.

Texas Watchdog has reported that city airport executives used city resources to create a string of shadowy companies -- but now Texas Watchdog has found that more than half a dozen city aiport officals took jobs with those companies.

This raises questions about conflicts of interest, as well as questions about whether these city officials were putting the taxpayer first -- or laying the groundwork for potentially lucrative careers.

Houston Mayor Bill White still refuses to answer questions about what he knew about the goings-on at the city airport system. He's says he's waiting for his office to complete an internal review. His office has not gotten back to us in response to a series of questions we posed to them earlier today; we hope to include their responses in tomorrow's story.

Here are all the stories published by Texas Watchdog so far from our first to the most recent:

Houston Airport System: Releasing salary list would make airports vulnerable to terrorists (6/18)

Houston Press Hair Balls blog and Chronicle’s Rick Casey riff on Texas Watchdog’s records tussle with Airport Authority (6/19)

Houston Mayor Bill White informed months ago of foreign airport projects; see ousted airport CEO’s five-figure expense reports (6/25)

Does Houston city government have a playbook to keep reporters at bay? (6/25)

Were taxpayers tapped too much for Tripoli trip tab? (6/25)

Libyan trip part of city review; taxpayers shouldn’t pay airport nonprofit’s travel bills (6/26)

Former airports chief: No nonprofit work done on city-funded $13K Libya trip (6/26)

Houston Airport System's hidden international web of companies operates in secret (7/9)

If you have any information concerning this story, please contact Texas Watchdog Deputy Editor Jennifer Peebles at 713-980-9778 or 281-656-1681. You can also e-mail Jennifer at jennifer@texaswatchdog.org.

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