Editor's note: The following story has graphic sexual language.
CROCKETT, TX (KTRE) - An Elkhart man in jail in connection to the death of a Grapeland woman is now facing a charge of sexual assault after a jail shower incident from January.
Already charged with first-degree aggravated kidnapping, Robert David Mobley Jr., 41, is now also charged with sexual assault.
According to an arrest affidavit, Mobley and another man were in the shower on Jan. 27 and the man bent down to grab his conditioner when Mobley told the man "I'm gonna show you what it feels like" and then sexually assaulted him.
The affidavit states the man was able to get away from Mobley and another inmate rose up from his bunk and asked "is everything good?" and Mobley said "yeah" to the questioned and then eyed the other man in a threatening look so the other man responded "yeah" out of fear of retaliation.
The inmate was then taken to Harold's House, where a nurse confirmed sexual assault trauma to him.
A justice of the peace signed the warrant against Mobley on Jan. 31.
Mobley has been charged since August of 2015 in connection to the death of Vanessa Melson, whose body was found in a shallow grave on July 7, 2015.
According to previous reports, Melson's stepfather saw Melso leave his home and get into a pickup with who the stepfather recognized as Mobley. He said that was the last time he saw Melson alive.
Witnesses said they saw Mobley beating Melson up as well as shoot her up repeatedly with meth. They said Mobley did it because Melson was a snitch.
In her video statement, Brenna Theurer told authorities that Vanessa Melson was screaming in pain at 6 a.m. on June 17, 2015, adding that she was begging for her life and to be allowed to see her children, the affidavit stated.
"Robert Mobley would only tell her to shut the f--- up," the affidavit stated. "Theurer confronted Mobley and told him to stop. Then, according to Theurer, Mobley approached her and told her she would be next if she did not shut up and that he would kill her if she contacted law enforcement."
The affidavit stated that as the beating got worse, Theurer told James Henderson she was going to call 911, but he told her to sit down and shut up before she was next. Theurer told authorities that because she was in fear for her life that she fled to the back of the house.
About 15 minutes later, Vanessa Melson grew quiet, and Theurer went back into the den area of the home, where she saw Mobley and Henderson facing away from her and looking "at Vanessa Melson's still body laying partially in the laundry room and partially in the garage," the affidavit stated.
On July 7, 2015, cadaver dogs found Vanessa Melson's partially buried on Henderson's property about 115 yards southeast of his home.
Mobley is scheduled for trial on the assault charge on Feb. 21.