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Search Warrant
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<br />relevant and material to the investigation as it provides supplemental geo-location information which, while not
<br />precise enough to identify a specific house, is accurate enough to provide block -level accuracy, in some cases.
<br />Investigators can use this information to correlate existing fact patterns and timelines to confirm or refute prior
<br />statements and/or evidence regarding the location of the target device.
<br />
<br />When any person makes or receives a phone call on their cellular phone, the following information for each call is
<br />stored by their respective phone company for at least one year: date, time, duration, phone number dialed or
<br />received numbers (even if caller identification is blocked by the calling party), text message transaction data, IP
<br />packet data session logs, and cellular tower location/sector at the beginning and ending of the call/data session. This
<br />is very basic information and does not provide an exact location of the person nor does it identify the other party.
<br />Cellular towers are strategically placed throughout the world by phone companies in an attempt to provide a
<br />seamless operation so people can travel virtually anywhere and make or receive a call. A typical cellular phone tower
<br />will be mounted up high on a large pole, building, or other structure which provides an unobstructed view of the
<br />population below. Cellular towers are divided into either three or six sectors, depending on the cellular provider. Each
<br />individual sector is mounted on the tower and faces a specific direction to provide maximum cellular coverage for the
<br />people in the area. The range of the tower depends on environmental factors and whether it is located in a highly
<br />populated urban environment or desolate rural area. Cellular towers do not provide an exact location of the suspect;
<br />they can only provide the physical location of the tower itself and a direction from the tower which can cover an area
<br />anywhere from 0-20 miles.
<br />
<br />I am aware cellular service providers maintain a master cell site list of all cell sites within their network. These cell
<br />site lists will include the specific switch, cell site number, name, physical address, latitude and longitude of the cell
<br />site, all sectors associated with each cell site, azimuth, and beam-width of each related sector. When reviewing
<br />call detail and specialized location records from the carriers, the records may only reference a specific switch, cell
<br />and sector, or LAC and CID/eNodeB ID, related to each usage event; they usually will not include the location
<br />(latitude and longitude) of the actual cell site and azimuth of the sector. It becomes necessary to reference a cell
<br />site list in order to plot the exact location of the cell site and to identify the azimuth of the sector used associated
<br />with specific usage events.
<br />
<br />Also, in the course of the investigation and review of the call detail and specialized location records, it may
<br />become necessary to visualize all cell sites within a geographic region of interest, not just the cell sites used by
<br />the target phone. It is just as important to show cell sites not used by a target phone, as it is to show cell sites
<br />used. By obtaining the master cell site lists from the cellular service providers, investigators are able to plot all of
<br />the cell sites in a given region, helping investigators with disproving of alibis, statements, and other observations
<br />evidenced by the records.
<br />
<br />Based on the above information as well as my training and experience, it is my opinion that call detail records and cell
<br />tower data for telephone number 714-727-7369 will corroborate relevant information to this investigation.
<br />Furthermore, it is my opinion that all the telephone company records, including all available subscriber information,
<br />including customer service records, customer identification, and all services provided (i.e., call forwarding, call
<br />waiting, speed dialing), and any related services for the telephone number 714-727-7369 for the billing rounds which
<br />include the period of 9/1/2022 PST – 5/16/2023 PST would further this investigation and tend to identify a particular
<br />person(s) committed a public offense.
<br />
<br />Subscriber information for the Target Telephone Number(s) and phone(s) contacted by the Target Telephone
<br />Number during the period of time authorized by the Search Warrant will provide me with the cellular device’s
<br />registered owner’s name, address, device serial number, and activation/deactivation date. This basic information will
<br />aid in confirming the subscriber of the Target Telephone Number as well as what type of cellular device is associated
<br />with the account (i.e. serial number and other network related numbers). Call detail records with cellular site
<br />information will tend to basic cellular tower location information, which can range up to 20 miles, depending on the
<br />environment. This information will aid with identifying the whereabouts and identity, of the suspect(s) prior to the
<br />shooting, at the time of the shooting and where the suspect(s) travelled to after the shooting.
<br />
<br />Based on the aforementioned information and my training and experience, I believe probable cause exists to
<br />examine the account associated with the Target Telephone Number(s) for subscriber information and call detail
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