An arrest affidavit alleges Brad Simpson, the husband of missing Olmos Park realtor Suzanne Clark Simpson, took a "large bulky item" to a dumpsite and also purchased cement, trash bags and bleach, the Express-News reports. Authorities used location data from Brad Simpson's cell phone and pickup truck to show him driving the vehicle during the early October time frame when his wife went missing, according to the Express-News' reporting on the document. Additionally, police found notes they think were written by Brad Simpson and items they believe he burned, the daily reports, citing details from the affidavit. After executing a search warrant at property the Simpsons own in Bandera, Texas Rangers found a burnt laptop and three cellphones, according to the document.