It's a familiar pattern -- the suspects of today become the victims of tomorrow. Cops have long known and studies have proved that in many cases the two groups are virtually interchangeable. Baltimore Sun's police reporter Justin Fenton sent me one more example:

The Baltimore Police Department last fall said they wanted to step up warrant service because some of those being sought might be the next perpetrator - or victim - of a violent crime.  It's not a new concept, but a recent death helps underscore the reasoning behind that philosophy, as well as its limitations.
 
Caneil Fullwood has a long rap sheet - he twice beat attempted first-degree murder charges, in 2000 and 2005. He would be found guilty of robbery and handgun charges, and several times was found guilty of violating his probation.
 
In March of 2007, he was one of three people in a vehicle with a cracked headlight that was stopped by Maj. (now Col.) Dean Palmere and another officer while the vehicle was parallel parking in West Baltimore. Inside, police found baggies of drugs and a loaded .380 Bersa handgun that later turned out to be stolen, court records show. Fullwood, also known as Cornell Ford, was found guilty in September 2006 of drug possession and sentenced to four years, with all but three years and six months suspended, followed by three years probation.
 
The conviction resulted in Fullwood being placed in the state's Violence Prevention Initiative, a state program that pushes for tighter scrutiny of violent individuals, and he would be twice charged with and found guilty of violating his probation. On March 6, 2009, another warrant was issued for a violation. Fullwood had been arrested for trespassing a month earlier, and his probation agent said he was had repeatedly failed to show proof that he was working or in an educational program. The warrant was signed by Baltimore Circuit Judge Martin P. Welch and he was taken to Central Booking.
 
The next day, Fullwood posted $50,000 corporate bond to await a hearing.
 
Police now say that less than three weeks later, Fullwood was in the 700 block of W. North Ave. on March 26, 2009 when he was shot several times and killed. Authorities believe he tried to rob a man, who responded by firing back.
 
Police Commissioner Frederick H. Bealefeld III has said that serving warrants on violent individuals can help pull them off the streets for a time, perhaps preventing them from killing or getting killed. But Fullwood's situation shows police's limited ability to control those who keep slipping back onto the streets and into old ways.