bryan santana of orlando , florida has been charged with murder in the death of his former roommate shelby fazio .
in court documents , santana admitted to strangling and stabbing fazio , a disney world employee , to death , and then having sex with her corpse .
he is also charged with attempted murder for allegedly attacking their third roommate with a knife and killing fazio 's dog .
his trial was set to begin on tuesday , but was pushed back after he smeared feces all over his body at the courthouse and tried to hit an officer .
in opening statements on wednesday , prosecutors described how he ` delighted ' in the murder of fazio .
they also showed photos of the messages he allegedly wrote on his wall in her dog 's blood , including one that said ` i 'm not sorry for what i did '