the 15 year old was arrested in connection to his sister, Amanda's murder

TYLER - Mark Nathaniel Anderson appeared in court again Monday in front of Judge Floyd Getz at the Smith County Detention Center.  Anderson, who goes by, Nate, was arrested in November in connection to his sister, Amanda's September 15th murder inside her New Chapel Hill home.  According to the arrest affidavit, investigators say Amanda, who attended Tyler Junior College, was shot four times in the head.  Police say, Nate Anderson, 15, claims he went on a short jog, and came home to find his sister dead in what he told police might have been a possible robbery gone bad.  But investigators say nothing was stolen and his story doesn't add up.  The bullet wounds appeared to match a .22 calliber semi-automatic handgun, the same gun, police say, Nate's father, Mark Anderson had given him years before, for target shooting.  And when police arrived at the scene, the affidavit says Nate's clothes were covered in Amanda's blood, but he initially claimed he never went inside the house.  However, 911 records show Nate told operators his sister had been shot several times in the head... authorities say it would be impossible to know that unless he was at some point inside the house after she was shot.  Mark and Stacy Anderson still maintain their son is innocent.

The next scheduled hearing is set for December 20, 2010 at 8:30 am.

Jessica Wilson/ KETKnbc.com