article_snippet.sent: According to Houston city codes - Duncan Burton should not have been driving because of a prior drugs conviction .
article_snippet.sent: According to Houston regulations someone with a drug conviction is not eligible for a city permit to drive cabs.
article_snippet.sent: However, Houston regulations could appeal and still receive one.
article_snippet.sent: Duncan Burton did not have a city permit to drive a cab and had never applied for an exemption.
article_snippet.sent: This week in Denver, a driver tried and failed to break into a passenger's home.