>> and as i came around the corner, i looked, and i thought, why did robin spend the night here? that was my first reaction. and then when i looked closer, i saw that she didn't spend the night, that she had been killed. >> she ran out of the place. someone called 911. detective jeff lancaster was among the first to arrive at the crime scene. >> she was laying facedown. she had a pool of blood under one side. she had some slash marks to the left side of her face. a neck injury from a slashing type wound from a knife. >> it didn't take lancaster long to figure out what happened. this was no accident. >> she had two knife wounds to her back, the right side lower area near the spine. >> it looked, frankly, elementary. robin had been murdered in what appeared to be an attempted robbery.