ORIGIN REPORT
People will tell you it’s an NYPD radio code. It isn’t. It’s a statute number that cops, courts, and jails said out loud until the street borrowed it — the same way L.A. borrowed 5150.
Fitness to proceed. If the court thinks a defendant may not understand the case, it orders a 730 examination. Police, prosecutors, and public defenders all use the number out loud. The street heard the number in arraignment, on the island, in the van — and kept it.
A long-running jailhouse version: 730 as the paperwork that marks an inmate as mentally disturbed. Same statute, different floor of the building. Urban Dictionary collected this as early as 2005.
Some NYC rappers told interviewers the term comes from psychiatric patients getting medication at 7:30 in the morning and 7:30 at night. Plausible as a folk memory. Weaker on paper than the statute.
At 7:30 the hands of a clock sit at a crooked angle. The Right Rhymes lists this as one possible picture-etymology: the time itself looks off. Poetry, not a filing.
California Welfare & Institutions Code 5150 — 72-hour involuntary psych hold. Same move, different code. Hip-hop already had 5150 from N.W.A. onward. 730 is the New York twin.
www.nysenate.gov/legislation/laws/CPL/730.10
statute
The actual law the slang comes from. Not a radio code.
“Incapacitated person” means a defendant who as a result of mental disease or defect lacks capacity to understand the proceedings against him or to assist in his own defense. § 730.30 authorizes the court to order an examination.
Wiktionary
Updated continuously
lexicon
Lexicographers pin it to Article 730 and cite Black Sheep, Big L, and a 2009 Complex article.
A reference to article 730 of the New York Criminal Procedure Law, which outlines procedures for the involuntary confinement of mentally incapacitated defendants. Equivalent to 5150 in California slang.
ypdcrime.com/cpl/article730.php
statute
The working copy criminal lawyers actually open.
Article 730 provides that any time the court is of the opinion that the defendant may be an incapacitated person, it must issue an order of examination. In the street: they put a 730 on him.