SACRAMENTO, Calif. -- The Ukrainian immigrant arrested in the stabbing deaths of his pregnant wife and five other relatives will be charged with seven counts of murder, including one for his unborn child, prosecutors said Tuesday.

District Attorney Jan Scully said Tuesday she has not decided whether to seek the death penalty against Nikolay Soltys.

Soltys, 27, told police the victims had been "poisoning" him -- perhaps meaning they were ruining his reputation, authorities said.

The district attorney said she could file charges in the murder of a fetus as long as the fetus was at least 7 to 8 weeks old. Soltys' wife was three months pregnant.

Scully said she will try to keep the trial in Sacramento despite the heavy publicity surrounding the crime and Soltys' capture.