Binh Thai Luc, the 35-year-old illegal immigrant and possible gang member who is accused of killing five people in an Ingleside home last week, is now facing an additional charge in addition to the five counts of murder: lying in wait. Police have revealed that they believe Luc knew the family and was let in to the home (possibly Thursday night), where he likely killed the four people there before lying in wait for 32-year-old Vincent Lei.

Some sources have suggested the motive had to do with an unpaid gambling debt.

Police have now described the murder weapons as a "blunt instrument" as well as a "sharp-edged weapon."

Though Luc could face the death penalty, the Chron reports that prosecutors are not likely to seek it in this case.