A Florida woman was arrested Wednesday in connection with the death of a 4-year-old boy she adopted in Haiti and brought to the United States last year, the Polk County Sheriffs Office announced.

Patricia Saintizaire, 36, is facing charges of murder, aggravated child abuse and tampering with a witness in the death of her son, Bryan Boyer, who died May 2 of a liver injury that hospital staff considered suspicious, according to the announcement from the sheriffs office in central Florida.

Speaking at a news conference in Winter Haven following the arrest, Polk County Sheriff Grady Judd said Bryan, born in Haiti, was adopted by Saintizaire last year.