Next to the anti-theft door on the wall, about one meter above the ground, there was a chalk-drawn star. Such marks are generally those used by thieves as a signal for a burglary.
I remember Master once saying that they had cracked a case last winter, where the burglars had broken into a house and then killed the homeowner on a spur of the moment, and there was an inverted triangle drawn in front of that victim's door.
It was only after interrogation that it became known, that this was their line's usual modus operandi; an inverted triangle represents a single female, an 'x' denotes that nobody's home, and a 'o' that there are people living there permanently.
After casing the place multiple times with no changes, it would then be safe to make a move. Through that case, the anti-pickpocketing brigade had continuously cracked several related cases in succession, smashing a few burglary rings. Could Dong Chengwen's home have been targeted by thieves?
