Section 410.50. Custody and supervision of probationers

1.   Custody.  A person who is under a sentence of probation is in the
  legal custody of  the  court  that  imposed  it  pending  expiration  or
  termination of the period of the sentence.
    2.    Supervision.    The  probation department serving the court that
  imposed a  sentence  of  probation  has  the  duty  of  supervising  the
  defendant during the period of such legal custody.
    3.    Search order.  If at any time during the period of probation the
  court has reasonable cause to believe that the defendant has violated  a
  condition of the sentence, it may issue a search order.  Such order must
  be  directed  to  a  probation officer and may authorize such officer to
  search the person of the defendant  and/or  any  premises  in  which  he
  resides  or  any  real or personal property which he owns or which is in
  his possession.
    4.  Taking custody without warrant.   When  a  probation  officer  has
  reasonable cause to believe that a person under his supervision pursuant
  to  a  sentence  of  probation has violated a condition of the sentence,
  such officer may, without a warrant, take the probationer  into  custody
  and search his person.
    5.   Assistance by police officer.  In executing a search order, or in
  taking a person into custody, pursuant  to  this  section,  a  probation
  officer may be assisted by a police officer.