California criminal statutes allow, as an alternative to written affidavits, Penal Code
§1526(b)(1) permits sworn oral statements that are subsequently transcribed. For example, the
affiant may phone the magistrate, state probable cause, and obtain the magistrate’s verbal
authorization to sign the latter’s name to the warrant under Penal Code §1528(b).
According to one autoritative source, The resulting warrant is the so-called telephonic (or, more
accurately, telephonically authorized) search warrant. The expression “telephonic search
warrant” can give rise to the erroneous impression that the warrant itself is oral. All search
warrants must be in writing says a local
criminal
attorney in torrance. The only thing different about a telephonic warrant is that the affiant
signs the magistrate’s name to a duplicate original search warrant in the field. These
telephone warrants are commonplace in drug cases and other criminal investigations conducted by the
police in the real world.