Her running the stop sign is new to me - but it seems it would have been less of a *bogus* (my term for his pulling her over for failing to signal) stop if he had actually pulled her over for failing to stop at a stop sign. Kinda weird that he didn't cite her for that - IMO one is less likely to react defensively when failing to stop at a stop sign than for being pulled over for failure to signal on what looked to be a not heavily trafficked street...
Respectfully BBM, may be a bogus but its a real law....
Sec. 545.104. SIGNALING TURNS; USE OF TURN SIGNALS. (a) An operator shall use the signal authorized by Section 545.106 to indicate an intention to turn, change lanes, or start from a parked position.
(b) An operator intending to turn a vehicle right or left shall signal continuously for not less than the last 100 feet of movement of the vehicle before the turn.
(c) An operator may not light the signals on only one side of the vehicle on a parked or disabled vehicle or use the signals as a courtesy or "do pass" signal to the operator of another vehicle approaching from the rear.
Acts 1995, 74th Leg., ch. 165, Sec. 1, eff. Sept. 1, 1995.
http://www.statutes.legis.state.tx.us/Docs/TN/htm/TN.545.htm
Sec. 544.010. STOP SIGNS AND YIELD SIGNS. (a) Unless directed to proceed by a police officer or traffic-control signal, the operator of a vehicle or streetcar approaching an intersection with a stop sign shall stop as provided by Subsection (c).
(b) If safety requires, the operator of a vehicle approaching a yield sign shall stop as provided by Subsection (c).
(c) An operator required to stop by this section shall stop before entering the crosswalk on the near side of the intersection. In the absence of a crosswalk, the operator shall stop at a clearly marked stop line. In the absence of a stop line, the operator shall stop at the place nearest the intersecting roadway where the operator has a view of approaching traffic on the intersecting roadway.
Acts 1995, 74th Leg., ch. 165, Sec. 1, eff. Sept. 1, 1995.
http://www.statutes.legis.state.tx.us/docs/TN/htm/TN.544.htm
**disclaimer, these may have been updated but haven't seen in a quick search.