San Mateo PD called the ISRC and requested for trains to be searched for a murder suspect they were looking for. San Mateo PD further advised that one of their officers was pinging the suspects cell phone and that it indicated that the ping was coming from the Colma Station. An earlier ping showed that the suspect may have been at the SFO Station. A simultaneous search was conducted of multiple trains holding at the Daly City and Colma Stations by BART and allied agencies. The officers were unable to locate the suspect in question. Trains were held so that the officers could await cover and search them.