<p>Four Miami police officers were given federal prison sentences ranging from about a year to three years Wednesday for planting guns after questionable police shootings or lying to cover them up.</p>
<p>Prosecutors asked for sentences as long as 11 years in the city's biggest police corruption scandal in nearly two decades, which was blamed on anti-crime units under pressure to halt a rash of deadly tourist robberies in the mid-1990s.</p>