Section 60.30. §s of evidence; identification by means of previous recognition, in addition to present identification

In any criminal proceeding in which the defendant's commission  of  an
  offense  is  in  issue, a witness who testifies that (a) he observed the
  person claimed by the people to be the defendant either at the time  and
  place  of  the  commission  of  the  offense or upon some other occasion
  relevant to the case, and (b) on the basis of present recollection,  the
  defendant  is the person in question and (c) on a subsequent occasion he
  observed the defendant, under circumstances consistent with such  rights
  as  an accused person may derive under the constitution of this state or
  of the United States, and then also recognized him as  the  same  person
  whom  he  had  observed  on the first or incriminating occasion, may, in
  addition to making an identification of the defendant  at  the  criminal
  proceeding  on  the  basis of present recollection as the person whom he
  observed on the first  or  incriminating  occasion,  also  describe  his
  previous  recognition  of the defendant and testify that the person whom
  he observed on such second occasion is  the  same  person  whom  he  had
  observed  on  the  first  or  incriminating  occasion.    Such testimony
  constitutes evidence in chief.