Last spring, reports of a federal corruption inquiry began trickling through the Alabama Legislature as its members argued fiercely over a bill to allow some form of gambling in the state. Several legislators received subpoenas, others acknowledged wearing recording devices and still others said they had received surprise visits from F.B.I. agents.

In their offices and along bar stools after work, lobbyists and politicians speculated feverishly about what would become of it.

On Monday, they found out.

Four state senators, three lobbyists and two powerful and politically connected businessmen were among 11 people arrested and charged by federal investigators with being part of a wide-ranging conspiracy in which lawmakers were offered generous campaign contributions in exchange for pro-gambling votes. All are facing possible jail time.