The logo should be smart, clever, intelligent, and convey power, strength, compassion, and protection. It should denote competence, authority, and quality.
Creativity and originality are highly valued and encouraged.
Submitting essentially the same logo multiple times with only minor changes should be avoided.
Duplicating another artist's work by merely adding small changes will be deemed repetitive and will not gain much favor.
You may decide whether the logo should incorporate DUI elements. The logo may include such elements, but it must not appear shoddy, gimmicky, cheap, and/or send the wrong message.
It should be noted that comprehensive DUI defense of alcohol and/or drugs (RX or otherwise) is a science heavy field. Lab machines test substances present in blood and/or breath all at the molecular level.
Ultimately, when finalized, the logo must appeal to those who expect, demand, and are willing to pay for quality. That is the demographic.