Bumbak, Ann R., <br/><br/>
Profiling cop-killers / 
Ann R. Bumbak. 
 - xxii, 252 pages :  illustrations ;  24 cm 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9781482211412  RM129.55 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Police murders--United States.