1a
Never let suspects stay together.
1b
Never screw (over) your partner.
2
Always wear gloves at a crime scene.
3a
Don't believe what you're told. Double check.
3b
Never be unreachable.
4
If you have a secret, the best thing is to keep it to yourself. The second-best is to tell one other person if you must. There is no third best.
5
You don't waste good.
6
Never say you're sorry. It's a sign of weakness.
7
Always be specific when you lie.
8
Never take anything for granted.
9
Never go anywhere without a knife.
10
Never get personally involved in a case.
11
When the job is done, walk away.
12
Never date a coworker.
13
Never, ever involve lawyers.
14
Bend the line, don't break it.
15
Always work as a team.
16
If someone thinks they have the upper hand, break it.
18
It's better to seek forgiveness than ask permission.
20
Always look under
22
Never, ever interrupt Gibbs in interrogation.
23
Never mess with a Marine's coffee if you want to live.
27
There are two ways to follow someone.
1st way - they never notice you;
2nd way - they only notice you.
28
If you need help, ask!
35
Always watch the watchers.
36
If it feels like you're being played, you probably are.
38
Your case, your lead.
39
There is no such thing as coincidence.
40
If it seems like someone's out to get you, they are.
42
Don't ever accept an apology from someone that just sucker-punched you.
44
First things first, hide the women and children
45
Clean up your messes.
51
Sometimes - you're wrong
62
Always give people space when they get off an elevator
69
Never trust a woman who doesn't trust her man.
70
Keep digging till you hit bottom