“My gaze falls on the machetes lined up on the magnet strip, immaculate and shiny after soaking in the chlorine solution I use for cleaning. I’ve been reading up online: Chlorine can remove visual evidence of blood, but to completely destroy hemoglobin, so it can’t be detected by forensics, you need a cleaning agent like hydrogen peroxide. Peroxy, the stuff that squirts out of the power hose I use to mop this concrete floor. I’m the last one out at night, so that job falls on me.”