Unlike the familiar anemic .32 pistol ammo, the 7.62x25 appears to be rather formidable. Googling for 7.62x25 turns up stuff like this:
In other words, some news accounts may have blundered into something near the truth.
Condolences to Officer Taylor's family.
There are several components necessary for a cartridge to achieve "stopping power" or lethal effectiveness-speed is just one and frequently the least important.
Most authorities argue that mass, bullet design,and diameter as well as "controllability"(the ability to place shots into the intended target area) are at least as important as speed.
Describing a weapon as a "military" style handgun throws a double element of confusion into the mix for the 2nd Amendment community since the public mind considers military weapons extra lethal while military thinkers point out the primary purpose of a military cartridge is to inflict incapacitating (but not necessarily lethal) damage to an opponent the better to tie up resources and deplete the will to fight. The hollow point bullet design, for example, remains banned by the Geneva Convention.
There are many aspects to this story not easily discussed in a forthright and intellectually honest manner in a public (or private, for that matter) forum.
Best regards,