Easy access. I think the rope belonged to someone close to him. Police speculated he had taken it from a screen printing shop. But if he knew someone who was interested in screen printing, or was doing projects at home, then he could have grabbed a length of it. Fashion designers or those in school for fashion often dye huge bolts of fabrics. I wonder if any of the POI's had roommates or partners with this hobby? What's your take, Bart, as to why he chose such a restraint?