Four people were arrested Tuesday, April 2, after Franklin County deputies went to search a warrant at a Lonedell area home and walked in on a working meth lab, the sheriff’s office reported.

Officers went to the home on Spring Meadows Drive about 10:20 p.m. and when they arrived they noticed a strong chemical odor associated with meth labs. They knocked on the door but the occupants, at first, refused to let them in.

When they finally opened the door for deputies, they denied they were coooking meth. Officers did a protective sweep of the house and found chemicals and other items used to manufacture meth, according to the report.

The four people were arrested and decontamined by St. Clair firefighters before being taken to the county jail for processing.

Three of the suspects had active arrest warrants, the sheriff’s office said. They were identified as Matthew Bean, 35, Lonedell, who was wanted for St. Clair ordinance violations; Cindy Davidson, 52, Villa Ridge, who was arrested for failing to register a motor vehicle; and Craig Warfel, 33, Imperial, arrested on warrants for failure to appear in court.

The fourth suspect is a 45-year-old woman from Lonedell, the sheriff’s office said.

Items seized in the investigation will be turned over to the Missouri Highway Patrol lab for analysis.