That seems wrong (unfair) that the state can go after someone for a crime after the federal government has already acquitted that person of the same crime.
It would be like being acquitted in russia and then charged in argentina.
See http://en.wikipedia.org/wiki/Double_Jeopardy_Clause#Dual_sov...
The “dual sovereignty” doctrine is not only tied into the existence of two
sets of laws often serving different federal-state purposes and the now
overruled principle that the Double Jeopardy Clause restricts only the
national government and not the states,[55] but it also reflects practical
considerations that undesirable consequences could follow an overruling
of the doctrine. Thus, a state might preempt federal authority by first
prosecuting and providing for a lenient sentence (as compared to the possible
federal sentence) or acquitting defendants who had the sympathy of state
authorities as against federal law enforcement.[56]
55 Benton v. Maryland, 395 U.S. 784 (1969), extended the clause to the states.
56 Reaffirmation of the doctrine against double jeopardy claims as to the
Federal Government and against due process claims as to the states occurred
in Abbate v. United States, 359 U.S. 187 (1959), and Bartkus v. Illinois,
359 U.S. 121 (1959), both cases containing extensive discussion and policy
analyses. The Justice Department follows a policy of generally not duplicating
a state prosecution brought and carried out in good faith, see Petite
v. United States, 361 U.S. 529, 531 (1960); Rinaldi v. United States, 434
U.S. 22 (1977), and several provisions of federal law forbid a federal
prosecution following a state prosecution. E.g., 18 U.S.C. §§ 659, 660, 1992,
2117. The Brown Commission recommended a general statute to this effect,
preserving discretion in federal authorities to proceed upon certification by
the Attorney General that a United States interest would be unduly harmed if
there were no federal prosecution. NATIONAL COMMISSION ON REFORM OF FEDERAL
CRIMINAL LAWS, FINAL REPORT 707 (1971).
IOW: don't try to take the code your employer paid you to write/modify and use it at another job.