Juan Rios, his mother, Terry, and his fiancée, Amy Culwell, were killed Saturday evening.
Two National Guard units arrived in Wichita Falls Thursday.
A multi-vehicle crash near the Wise and Montague County lines diverts highway traffic for hours.
Services for Wise County Judge Bill McElhaney of Bridgeport will be Thursday morning in the Decatur Civic Center.
A Colorado parolee is linked to a the shooting of Montague County Sheriff's deputy and the murder of Colorado's top prison official.