HOUSTON A Spring man accused of killing his mother and sister appeared in court before a judge Monday to hear the charges filed against him.

Police arrested Mark Gideon near the intersection of Herald Avenue and McCarty Drive in east Houston Friday night.

Gideon is officially charged with capital murder in the deaths of his 75-year-old mother Margaret and 52-year-old sister Vonda who were found dead inside their home on Thursday.

Investigators said the women had been dead at least a week. They had trauma to their bodies, but were so badly decomposed, investigators couldn t immediately determine what caused their death.

Gideon is being held in the Harris County Jail with no bond. His next court appearance is set for Jan. 14, 2014.

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