Oxford Shooter had a SIG SP2022
https://www.policemag.com/339693/sig-sauer-sp2022
from the website
"The company's new high-capacity P226 proved a big seller. First available in 9x19, it was later offered chambered for the .40 S&W and a proprietary cartridge with magnum-like ballistics, the .357 SIG. Today, SIG pistols are used by-among others-the Department of Homeland Security, U.S. Navy SEALS, U.S. Coast Guard, Ohio Highway Patrol, Rhode Island State Police, North Carolina Highway Patrol, Texas Rangers, and the Michigan State Police."