County sheriff has used stingray over 300 times with no warrant San Bernardino Sheriff's Department doesn't tell judges it's using spy device.

The sheriff in San Bernardino County—east of Los Angeles County—has deployed a stingray hundreds of times without a warrant, and under questionable judicial authority.
In response to a public records request, the San Bernardino Sheriff’s Department (SBSD) sent Ars, among other outlets, a rare example of a template for a "pen register and trap and trace order" application. (In the letter, county lawyers claimed this was a warrant application template, when it clearly is not.) The SBSD is the law enforcement agency for the entire county, the 12th-most populous county in the United States, and the fifth-most populous in California.
Stingrays, or cell-site simulators, can be used to determine location by spoofing a cell tower, but they can also be used to intercept calls and text messages. Once deployed, the devices intercept data from a target phone as well as information from other phones within the vicinity. For years, federal and local law enforcement have tried to keep their existence a secret while simultaneously upgrading their capabilities. Over the last year, as the devices have become scrutinized, new information about the secretive devices has been revealed.
This template application, surprisingly, cites no legal authority on which to base its activities. The SBSD did not respond to Ars’ request for comment.
"This is astonishing because it suggests the absence of legal authorization (because if there were clear legal authorization you can bet the government would be citing it)," Fred Cate, a law professor at Indiana University, told Ars by e-mail.
"Alternatively, it might suggest that the government just doesn’t care about legal authorization. Either interpretation is profoundly troubling," he said.
The documents sent to Ars by the SBSD's county attorneys also show that since acquiring a stingray in late 2012, the agency has used it 303 times between January 1, 2014 and May 7, 2015.
Further, the SBSD, like other departments nationwide, maintains a questionable non-disclosure agreement (NDA) with the FBI that indicates that the agency will work with local prosecuting authority to dismiss cases rather than reveal information in court about stingrays. (This has happened in at least some known jurisdictions elsewhere in the country.)
Just last week, the FBI released a statement regarding the use of stingrays, which claims the opposite of what its NDA with local law enforcement actually says. The SBSD also declined to produce policies, guidelines, training materials, nor the specific cases where stingrays were used.
The FBI and the Harris Corporation, the manufacturer of the device, have repeatedly declined to respond to Ars' specific questions.

That old standby, a “pen/trap order”

Further Reading

FBI would rather prosecutors drop cases than disclose stingray details

New documents released by NYCLU shed light on Erie County's use of spying tool.

Detectives typically go to a local judge before they want to deploy the device and file an application for a "pen register and trap and trace order." Those orders are often sealed, even well after the case has concluded, so there is usually little public scrutiny. But, as is the case in most jurisdictions nationwide, this application to the court is not very explicit about what exactly what law enforcement wants to do, nor how exactly it will be carried out. This is precisely the reason why Washington state just signed into law a new warrant requirement for stingray use, which also imposes stringent disclosure and data minimization standards. A similar bill in California is pending in the state legislature.
The template states:

DetectiveName, a Detective for the San Bernardino County Sheriff's Department. hereby applies to the Court for an Order (1) authorizing the use of a PEN register on the telephone lines currently designated by the numbers; Telephone Number (The “Telephone Line”); (2) authorizing the use of a trap-and-trace device on the Telephone Line: and (3) requiring the disclosure of subscriber name and address, whether listed or unlisted. for numbers called by the Telephone Line or numbers calling the Telephone Line. or found during investigation of this case upon oral or written demand of agents of the San Bernardino County Sheriff‘s Department. In support of this application, he states the following:

1) I am a detective for the San Bernardino County Sheriff's Departmant and am requesting an Order authorizing the installation and use of a PEN register and a trap-and-trace device. and the disclosure of subscriber information.

2) I certify that the San Bernardino County Sheriffs Department is conducting a criminal investigation of Crime in connection with possible violations of Crime Definition. It is believed that the below named persons and other unknowns are using the Telephone Lines in furtherance of the subject offenses and that the information likely to be obtained from the PEN register and the trap-and-trace devices is relevant to the ongoing criminal investigation being conducted by the above named agency.

AFFIDAVIT "Insert Probable Cause"

In the pre-cellphone era, a "pen register and trap and trace order" allowed law enforcement to obtain someone's calling metadata in near real-time from the telephone company. Now, that same data can also be gathered directly by the cops themselves through the use of a stingray.
Nathan Wessler, an attorney with the American Civil Liberties Union, told Ars that this type of language is very unusual.
"The template is likely to mislead judges who receive applications based on it because it gives no indication that the Sheriff’s Department intends to use a stingray," he wrote by e-mail.
"We have seen similarly misleading applications submitted to judges by police departments across the country," he continued. "Judges have no hope of ensuring that use of stingrays complies with the Fourth Amendment if they are kept in the dark about law enforcement’s intent to use a stingray. When police hide the ball from judges, our justice system cannot ensure justice."
Other lawyers concurred.
"On the fact the pen/trap order makes no reference to a stingray or IMSI catcher at all is really troubling because this order reads like any standard pen/trap application which would be given to a cell phone provider," Hanni Fakhoury, an attorney with the Electronic Frontier Foundation, and a former federal public defender, told Ars by e-mail.

Read the rest @ http://arstechnica.com/tech-policy/2015/05/county-sheriff-has-used-stingray-over-300-times-with-no-warrant/