>> hello everyone i'm kathleen brian representing the energy efficiency programs from the department of the environment. so that was a great intro. give me just a moment. again, kathleen brian representing the department of the environment talking about our role in energy efficiency, the present and the future. so we know that our energy future will be in renewable energy but we also believe that energy efficiency matters is the first step, the first step and the journey to renewables must be an optimization of existing structures and building efficiency is the first step in that direction. san francisco environment has the experience and the community relationships that work we have run energy efficiency programs for for 15 years now and we expect to run these programs for the future even with ssca in place and our team can be a familiar face to building owners small business owners multifamily building owners and commercial building owners we will also continue to prioritize our relationship with pg&e. we will continue to have success. the programs the department runs contribute 40

brian disappeared that he was very angry with brian and that he was going to jump him with a weapon. >> reporter: that matches her version of events. kathleenys the fatal blow wasn't from a punch, as shane lamb confessed, but from a knife. >> tell me what you believe happened between brian and rob render. >> i believe that render comes up behind him like this and cuts his throat and in the process, cuts himself. then, i believe, that brian starts falling forward and render grabs the door. that's why his thumbprint is on the door and then he pushes him like this. then he scrapes against those boxes. that's why the transfer blood is there. the attack is in the hallway. so we're all familiar with the blood evidence. >> reporter: and acting on a tip from this witness, kathleen's investigators, finding a piece of evidence in the police report, a pair of soiled underwear, with a brownish red color. kathleen thinks it may be blood. >> mario's attorney, kathleen zellner, believes that what may have happened in this ladies' bathroom could blow this case wide open. a stock boy, coming in this bathroom about a month after brian disappeared, saw that t