bryan santana , 20 , of orlando , florida , was found guilty of murdering his former roommate , shelby fazio , 23 , on thursday .
he was sentenced to life terms in prison .
santana previously admitted to strangling and stabbing fazio , a disney world employee , to death and having sex with her corpse .
he also attacked their third roommate with a knife and killed fazio 's dog .
his trial was set for tuesday , but pushed back after he smeared feces all over his body at the courthouse and tried to hit an officer .
in opening statements wednesday , prosecutors said santana ` delighted ' in the murder of fazio .
they also showed photos of the messages he wrote on the wall in her dog 's blood , including one that said ` i 'm not sorry for what i did '