Mother, son charged in Fort Madison fire

A mother and son were arrested Monday after an investigation revealed they set fire to their Fort Madison, Iowa home, the city's police department said.

Robert Lynn Vaughn, 45, and Marcia Ann Lawson, 64, are charged with first degree arson in connection with the Oct. 20 blaze at their home in the 2900 block of Avenue M.

They are currently being held on $25,000 bond in the Lee County Correctional Center.

The Fort Madison Fire Department, the Fort Madison Police Department and the Iowa State Fire Marshal conducted the investigation.