A surprising number of Harris County DWI and drug cases begin not with a traffic violation but with a phone call: "There's a car that's been sitting in front of my house." Brian Foley explains what that call authorizes in this video.
Three kinds of encounter
Consensual encounter. An officer may walk up to a parked car and talk to the occupant, just as any person could. No suspicion is required — and no obligation to answer is created. You may decline to speak and, if you are not detained, drive away.
Detention. The moment the officer does something a reasonable person would not feel free to ignore — takes your license, orders you to step out, blocks the car in, activates emergency lights — you are detained, and the officer needs reasonable suspicion of criminal activity.
Community caretaking. Texas recognizes a narrow exception allowing officers to check on a person who appears to need help — slumped over the wheel, for instance — without suspicion of a crime. The stop must be motivated by concern for welfare, and it ends once the welfare concern is resolved.
What an anonymous tip is worth
Under Florida v. J.L. (2000), an anonymous tip that provides no predictive detail and no basis for the tipster's knowledge does not, by itself, create reasonable suspicion. "A suspicious car on my street" describes no crime. The officer must observe something more — an odor, open containers, furtive movements, a driver who cannot wake up — before detaining. A tip from an identified caller reporting a specific crime (Navarette v. California) carries more weight.
Parked-car DWI cases
Sleeping in a running car is a common scenario. The State must prove you were "operating" the vehicle — sitting in the driver's seat with the engine on usually qualifies — and that the officer's encounter was lawful at each stage. Where the officer went from a welfare check to a DWI investigation without observing signs of intoxication first, the detention is challenged.
What to do
Roll the window down partway. Provide identification if asked and you are detained. Decline to answer questions. Ask, "Am I free to go?" If the answer is yes, go. If no, say nothing more and call a lawyer afterward. Brian Foley and Luis Baez handle parked-car cases regularly. Call or text (713) 703-1718.