That bottom right picture caught my eye. That is a Colt Trooper Mark V.
Found this online:
Unlike the other members of the Vice team, Castillo did not seem to favor any one particular weapon for his sidearm and can be using several inconsistently throughout the series. However, almost all of the pistols the Lieutenant carried were large-caliber revolvers, including a Smith & Wesson Model 29 in .44 Magnum (as well as the stainless steel version, the 629), a Smith & Wesson Model 686 in .357 Magnum, a Colt Trooper MK V in .357 Magnum, a Smith & Wesson model 29 in .44 Magnum, and a Colt Python in .357 Magnum.