Why is a squid's word better than its deed?  Squids sign their deeds with erasable ink.

Why is squid graffiti so vicious?  It's the irascible ink.

Squid ink is both indelible and inedible -- or so they would have you believe!

Why did the squid's world come tumbling down?  It was juggling too much at once.

All squid police are armed.

Squid police never take fingerprints (too much work).  Instead, they take ink samples (hence the phrase "police blotter").  The ink blots also provide instant Psych Evals, which can come in very handy.