According to the police investigation, there have been a great number of cases decided by the county government related to land problems, major construction projects, and eradication of illegal construction that have involved sums in the hundreds of millions or even billions of NT dollars (see chart). At the time of the murders, the county government was just moving to eradicate illegal construction along Huanchung East Road in Chungli.
根據警方現階段的調查，與桃園縣政府的政策實施相關之土地問題、重大工程、拆除違建等動輒數十億以至百億以上的決定相當多（見表），案發時即正要拆除中壢市環中東路的無照營業違建。