Detroit police did make 4 arrests like 10 days late...that is rare too.
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Getting away with murder is the norm in Detroit
http://www.detnews.com/article/2009...tting-away-with-murder-is-the-norm-in-Detroit
The most generous interpretation of 2008 homicide warrants and convictions supplied by local law enforcement officials shows that in more than 70 percent of homicide cases no suspect has been identified, arrested, charged or convicted of a killing.
The closure rate for homicide -- defined by the FBI as a case when at least one person is arrested and turned over to the prosecutor for prosecution -- in 2008 was an " abysmal" 33 percent to 35 percent, Evans said. The national average, according to the FBI, is 62 percent. In Los Angeles -- a city with five times the population and three times the police force of Detroit -- the homicide closure rate was nearly 70 percent.
"In the end, it is what the police do that makes a difference as to whether a homicide is solved," said Charles Wellford, a professor of criminal justice at the University of Maryland who has studied homicide in Detroit and Los Angeles. "There is no big city with a clearance rate as low as Detroit's."
The Detroit Police force, for its part, is underfunded and understaffed, said Evans, who was recently named the third Detroit police chief in a year. The Prosecutor's Office maintains that its budget has been slashed by a third over the past six years, leaving too few prosecutors and investigators to handle the load.
"I only have one part-time homicide investigator, if you can believe that," Worthy said.
There also is the "no-snitch" phenomenon in Detroit, which means citizens often are either too frightened or too hardened to cooperate with police. And even in the rare cases when a suspect does make it to trial, there have been unpredictable elements of judge and jury.