(CNN) -- A man has been arrested and charged with murder in the case of a central Illinois family found beaten to death in their home last month, police said.
Five members of a Beason, Illinois, family were beaten to death on September 21. A toddler survived.
Christopher Harris, 30, is being held at the Logan County Jail in connection with the September 21 killings, Sheriff Steve Nichols said Thursday. Exact charges will be determined by the county state's attorney's office and the Illinois attorney general's office, Nichols said.
"The arrest is based on the tireless efforts of investigators and the Illinois State Police crime lab [and] forensic analysis of evidence removed from the crime scene," Nichols told a news conference.
Harris is from McLean County, which borders Logan County, where the family lived. He was "familiar with" the family, though Nichols didn't say how.
Nichols also refused to comment on a motive for the killings.
More arrests are possible, and investigators are still following leads, Nichols said.
Raymond Gee, 46, Ruth Gee, 39, and three children were found beaten to death in their Beason, Illinois, home. All of them suffered blunt-force trauma, Nichols said last week. Beason is about 45 minutes northeast of Springfield.
The three children were identified as Justina Constant, 16, Dillen Constant, 14, and Austin Gee, 11.
A 3-year-old girl also was beaten but survived, Nichols said.
Police found with Harris a gray primer-painted pickup truck like one that was seen in the area the night the family was killed.