Conro v. Crane was a United States Supreme Court case that dealt with the issue of whether a state court had the authority to issue a writ of habeas corpus to a prisoner held in a federal prison. The case arose when a prisoner, Conro, was held in a federal prison in California and sought a writ of habeas corpus from the state court. The state court granted the writ, and the federal government appealed the decision to the Supreme Court. The Supreme Court held that the state court did not have the authority to issue the writ of habeas corpus. The Court reasoned that the writ of habeas corpus was a federal prerogative, and that the state court did not have the authority to interfere with the federal government's power to imprison individuals. The Court also noted that the writ of habeas corpus was a fundamental right, and that the state court should not be allowed to interfere with the federal government's power to protect the rights of individuals. In conclusion, the Supreme Court held that the state court did not have the authority to issue a writ of habeas corpus to a prisoner held in a federal prison. The Court reasoned that the writ of habeas corpus was a federal prerogative, and that the state court should not be allowed to interfere with the federal government's power to protect the rights of individuals.

Justice Field delivered the dissenting opinion in Conro v. Crane, arguing that the majority's decision was wrongfully decided and should be reversed. He argued that a contract between two parties must be interpreted according to its plain language, which is what he believed had been done by the lower court in this case. The contract stated that if either party failed to fulfill their obligations under it, then they would forfeit all rights granted them by it; thus, when one of the parties breached their obligation under the contract, they forfeited any right or title they may have held over certain property as part of said agreement. Justice Field further argued that since no other interpretation could reasonably be applied to such an unambiguous statement within a legal document like a contract, there was no need for extrinsic evidence nor did equity come into play here - both of which were cited by the majority as reasons why their ruling should stand instead of reversing it back down to how it had originally been decided at trial level. In conclusion he asserted his belief that contracts are meant to bind people together and not tear them apart; therefore any attempt at reinterpreting such documents beyond what is written therein goes against public policy and should not be allowed in courts of law