Polythene bags used to suffocate lawyer Willie Kimani, his client Josephat Mwenda and their driver Joseph Muiruri may have been provided by police officer Paul Mwangi. A trial court yesterday heard that the supermarket bags, which were on the victims' heads at the time their bodies were retrieved from Oldonyo Sabuk River, were similar to those collected from Mwangi’s house on July 4, 2016.