Re: Sx help: Name that pistol!
Odd choice. A Colt Double Eagle fits, as does the AMT Javelina (both 10mm). The H&K P-11 also fits the mechanics, but uses an unusual cartridge (7.62x36mm flechette).
If I was building a cop, he's probably use a Glock 17L as a primary weapon with a Colt Python for backup.