the prosecution's argument, roland kidnapped samantha, trapping her in the back seat using child safetyks, before killing her. >> she was found alone, in the woods, covered in her own blood, dead. she'd been stabbed multiple times from the bottom of her feet, throughout her torso, throughout her face, her neck, and her head. >> reporter: a forensic pathologist testified there were more than 100 stab wounds. the state presented incriminating evidence. cell phone tracking data showing roland and samantha's phones together when she disappeared. >> when her phone moved to a different area, did his phone also track in a different area? >> i believe so, it did. >> reporter: as well as video footage showing the suspect trying to use the college student's debit card. then later trying to sell her phone. >> do you see the person who tried to sell you the phone in the courtroom? >> yes, ma'am. >> where is he? please let the record reflect that he has identified the defendant, your honor. >> reporter: maria howard, roland's ex-girlfriend, testified she saw blood in his car. >> i asked him, why is