All pretty tough targets;

都是很难制服的目标
victims capable of defending themselves.

被害人都有能力保护自己
As the unsub's sense of power escalated, so did his confidence,

随着嫌犯的力量感的增强他的信心也会大增
leading to bigger and more difficult prey.

因此会找寻更有挑战性的猎物
That makes sense.

言之有理
Risky deaths would increase the unsub's feeling of superiority.

有风险的谋杀会加强嫌犯的成就感
Same thing with using a .357 magnum.

就和使用点357马格南手枪一样
It would make him feel powerful.

这会让他觉得很自己强大
Cops are at the top of that list.

首选目标是警察
High profile, always on alert, and they're gonna make headlines.

高调警觉而且会出现在头条新闻里
Killing a gangbanger isn't easy.

杀死帮派成员可不简单
They're always armed, travel in packs.

他们随身带武器且不单独出行