Opinion
Larry Alan Suite appeals from the judgment entered after he pled guilty to two counts of possession of a destructive device or explosive in a public place. (Pen. Code, § 12303.2.) His guilty plea followed the denial of his motions to dismiss and to suppress certain evidence. (Pen. Code, §§ 995, 1538.5.)
Appellant contends the trial court erred in not suppressing evidence obtained when state university police arranged for a “trap” of their own telephone line in an effort to locate the source of several bomb threats, and when the police also tape recorded those threatening calls. We disagree. We conclude that “trapping” is not conduct prohibited by Penal Code 1 section 631, subdivision (a), that the taping procedure did not violate the statutory prohibition against recording of a confidential conversation, and that neither the “trapping” nor the tape recording *684 violated appellant’s rights under either the Fourth Amendment to the United States Constitution or article I, section 13 of the California Constitution.
Early in the morning of December 5, 1977, an anonymous caller telephoned the emergency police phone number at California State University at San Jose, and reported that a fake bomb had been placed on a stairway of Duncan Hall, a campus building. The call was automatically tape recorded, as are all emergency calls to the university police. The university police officers dispatched to that location found a shoe box, which contained the burned pieces of a propane tank, a battery, a clock, and a rocket engine, all described by one expert as the remains of an improvised explosive device. At least three other anonymous calls were received on that day, all reporting the placement of bombs, set to go off, in various university buildings. Three buildings were evacuated and searched, but no bombs were found.
Later the same day, the university police requested Pacific Telephone to put a “trap” on the university’s emergency lines. In the San Jose area, where all ^telephone switching is done by computer, that computer is ordinarily programmed to retain a record of all calls made from every number, for billing purposes. When a “trap” is made, the computer is programmed to record and print out, if requested, the phone number source of all calls to a given number.
On December 6, Robert G. Fowler, an assistant professor of biology at the university, received an anonymous call from someone claiming to have placed the device in Duncan Hall. The caller told Fowler that unless he cancelled the genetics exam scheduled for the next day, some of his students would be hurt. Fowler then compiled a list of his students who were “significantly below average” in their grades at that time; appellant was among them.
Later that day, campus police went to an office in the school’s Business Tower in response to a call from a custodian. An officer found pieces of twisted metal and part of an electric charcoal starter, which appeared to be the remains of an explosion. The next day, December 7, at 7 a.m., university police received another anonymous call, asking if they had found the “goodie” or “toy” in the Business Tower. The printout from the trap indicated that the call came from appellant’s phone number.
*685 About an hour later, campus police received a call reporting that a bomb had been placed in the Old Science Building, which was the building where Professor Fowler’s exam was to be held. The trap revealed the call came from a campus pay phone.
Appellant was then arrested. A search of his residence and garage, conducted with his consent, disclosed a propane canister and other items.
I. Trapping
A. Penal Code Section 631, Subdivision (a)
First, appellant contends that trapping of a phone line is an “unauthorized connection” prohibited by Penal Code section 631, subdivision (a), and that the evidence obtained thereby is inadmissible.
Section 631 is part of the state’s Invasion of Privacy Act (§§ 631-637.2;
People
v.
Conklin
(1974)
The term “unauthorized connection” is undefined by statute. In early cases involving former section 640, the antecedent of section 631, identical language prohibiting an “unauthorized connection” to a telephone line was construed to prohibit a subscriber to telephone service from connecting his own equipment (i.e., an extension line) to his phone line without permission of the telephone company. The consent of both the subscriber and the phone company was required for such a connection to be “authorized.” (See, e.g.,
People
v.
Trieber
(1946)
More frequently, the prohibitions of section 631, subdivision (a) have been applied to prevent wiretapping or other similar interception of the content of telephone conversations. The Supreme Court’s recent discussion of the scope of section 631 in
Tavernetti
v.
Superior Court
(1978)
The scope of section 631, subdivision (a) was also discussed in
People
v.
Conklin, supra,
Trapping of the police emergency lines here neither intercepted nor revealed the content of any communication, but instead only disclosed the telephone numbers of the callers.
Appellant then relies on section 630, a legislative declaration of policy, to argue that section 631 must be interpreted broadly to prohibit trapping as a new method of electronic surveillance not in existence at the time of its passage. 2 However, section 630 does not support appel *687 lant’s argument; instead, that section strongly reinforces the conclusion that the Legislature’s concern was to prevent secretly listening to the contents of private conversations, or eavesdropping. Trapping is not eavesdropping.
B. Article I, Section 13 of the California Constitution
Appellant also contends that the trapping violated California’s constitutional prohibitions on unreasonable search and seizure, because no warrant was obtained before the trap was initiated. Appellant’s contention evidences a fundamental misunderstanding of the constitutional principles involved.
Under certain circumstances, the warrantless seizure of telephone company records of calls made to and from an individual’s home, office, or hotel room may violate article I, section 13 of the California Consti
3
Whether a caller is at home, in his office, or in a hotel room, he has a reasonable expectation that records of the
private
calls he makes will be utilized only for accounting and billing purp'oses.
4
(People
v.
Blair
(1979)
Appellant’s reliance on these cases is sorely misplaced. A person who telephones police and threatens to bomb a public building cannot reasonably expect that records of the call will be private; the only reasonable expectation under such circumstances is that police will make use of every available technology to trace the source of that call.
*688 II. Tape Recording
A. Penal Code Section 632
The university police routinely tape recorded all incoming calls on their two emergency lines. Appellant first contends the taping procedure violates Penal Code section 632.
5
Appellant correctly states that section 632 goes beyond the scope of section 631 by prohibiting not only eavesdropping, but also recordation of a confidential communication. A participant to a telephonic communication is exempted from the prohibition against recording the communication only if the other participant knows that it is being 'recorded.
(Forest E. Olson, Inc.
v.
Superior Court
(1976)
However, it is the recording of a “confidential communication” that is prohibited by section 632, subdivision (a). As defined by section 632, subdivision (c), a confidential communication includes “any communication carried on in such circumstances as may reasonably indicate that any party to such communication desires it to be confined to such parties, but excludes a communication made in a public gathering or in any legislative, judicial, executive or administrative proceeding open to the public, or in any other circumstance in which the parties to the communication may reasonably expect that the communication may be overheard or recorded.” (Italics added.)
It is ludicrous for the appellant to argue that his calls were confidential communications, the contents of which he wanted to be restricted to himself and their recipient. Surely a telephone call to the law enforcement officials of a state university, threatening that a bomb has been placed and set to go off in a university building, is not a confidential communication within the meaning of this statute. Furthermore, if there is any doubt that this conversation was not a confidential communication as defined above, section 633.5 would authorize the recording. That section provides: “Nothing in Section 631 or 632 shall be construed as prohibiting one party to a confidential communication from recording such communication for the purpose of *689 obtaining evidence reasonably believed to relate to the commission by another party to such communication of the crime of extortion, kidnapping, bribery, any felony involving violence against the person...” (Italics added.) A bomb threat unquestionably involves the potential for such violence.
B. Fourth Amendment Protection
Relying on
Katz
v.
United States
(1967)
III. Conclusion
Finally, despite his guilty plea to violations of section 12303.2, appellant now contends the devices which he possessed were neither destructive devices nor explosives within the meaning of that statute.
Issues cognizable on appeal following a guilty plea are limited to issues based on “reasonable constitutional, jurisdictional, or other grounds going to the legality of the proceedings” resulting in the plea. (§ 1237.5;
People
v.
DeVaughn
(1977)
Appellant’s reliance on
People
v.
Rebeles
(1971)
Judgment is affirmed.
White, P. J., and Feinberg, J., concurred.
Appellant’s petition for a hearing by the Supreme Court was denied March 27, 1980.
Notes
A11 statutory references are.fo the Penal Code unless otherwise indicated.
Section 630 provides in pertinent part: “The Legislature hereby declares that advances in science and technology have led to the development of new devices and *687 techniques for the purpose of eavesdropping upon private communications and that the invasion of privacy resulting from the continual and increasing use of such devices and techniques has created a serious threat to the free exercise of personal liberties and cannot be tolerated in a free and civilized society.” (Italics added.)
Article I, section 13 of the California Constitution provides in part: “The right of the people to be secure in their persons, houses, papers, and effects against unreasonable seizures and searches may not be violated.”
We note that the United States Supreme Court reached the opposite conclusion in
Smith
v.
Maryland
(1979)
Section 632 provides in pertinent part: “(a) Every person who, intentionally and without the consent of all parties to a confidential communication,.. .eavesdrops upon or records such confidential communication.. .shall be punishable by fine... or by imprisonment.”
