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The case I'm going to discuss is several years old but I found it very interesting and relevant to psychology and law. In 1992, a hunter found the body of a decomposing woman while hunting. After the police found out that the dead woman had been a prostitute, it led them to believe that a possible suspect was Thomas Huskey, a man known for bringing woman to the area. Huskey had a reputation for taking women, tying them up behind the zoo, beating them, and then having sex with them.

About a week after the first body was found, police searching the area found three more dead women. Huskey was arrested and confessed, on tape, to all four murders. During the confession, Huskey changed his voice and expressions and said that he was now "Kyle". Apparently, "Kyle" was the one who killed the women, not Thomas. After "Kyle" emerged, "Philip Daxx", a British man, surfaced. This lead investigators to believe that Huskey had multiple personality disorder.

After 6 years had passed, the trial finally began. Huskey plead not guilty by insanity. The defense psychologist said that Huskey suffered from multiple personality disorder, however, the prosecution psychologist said that Huskey simply created these personalities to manipulate the court. During the course of the trial, the cellmate of Huskey, testified that Huskey had read Sybil and was going to try to make it seem like he had multiple personality disorder to avoid the death penalty. Huskey's mother also agreed that he did not have this disorder. To further the case against Huskey, the prosecution noted that he gave specific details about the crime while he was Tom but if he really did have multiple personality disorder, he would have no recollection of these memories, since they belong to "Kyle".

After the jury deliberated for quite some time, they still had not come to a unanimous decision. The judge declared a mistrial. Huskey was to be tried again in 2002 but he asked for a lawyer during his confession, which was then ruled inadmissible. Huskey is currently in prison for 44 years for previous rape charges.

On another website, I found that the murder charges against Huskey were dropped due to detective errors. He is still in jail for the rape charges mentioned earlier.

Psychology is obviously present here. Because multiple personality disorder is so rare, it probably wasn't Huskey's  best idea to pretend he had it. Any personality disorder is severe and it's likely that Huskey may have had some other form of one. Although he wasn't proven guilty, it seems pretty possible that he did commit the four murders. I'm glad that he's at least in jail for the rape crimes he committed so that he can't go out and murder more innocent women.

http://www.trutv.com/library/crime/criminal_mind/psychology/multiples/index.html 

http://www.spring.org.uk/2010/01/the-7-psychological-principles-of-scams-protect-yourself-by-learning-the-techniques.php

  In October 2008, Michelle Kehoe drove herself and her two boys, Seth (age 2) and Sean (age 7) to Hook-n-Liner Pond near Littleton, IA. She then tied both of her boys up, duct taped their eyes, nose, and mouths, and slashed their throats leaving little Seth dead and seriously injuring Sean. She then proceeded to the edge of the pond and attempted suicide by slashing her own throat. When she did not succeed with her suicide attempt, Kehoe went to a nearby house and claimed that a man kidnapped them and killed her children. Unbeknown to Kehoe, her son Sean had survived the attack and was able to tell authorities in the hospital later that day what truly happened.
 In November 2009, Kehoe stood trial for the murder of her son Seth and plead insanity. She was later found guilty of 1st Degree Murder, Attempted Murder, and Child Endangerment. In December 2009, she was sentence to life without the possibility of parole for the murder, 25 years for attempted murder, and 10 years for the child endangerment charged.
 
 Click here for the article about the trial. This also has short video clips of the trial including testimony from both psychologists, the recorded statement from Kehoe's surviving son, and the Kwik Star surveillance video of the family shortly before the horrific crime.
 Click here for the article about the sentencing hearing and how Kehoe's husband asked for leniency but the judge denied it. (Please note that the dates written in the article are wrong. Kehoe committed the crime in 2008 and the trial was held in 2009)

 For me, this case hit extremely close to home, in more ways than one. First off, there is the physical aspects of the crime. Kehoe stopped with her boys at the Kwik Star in Jesup, Iowa (which is where I live) and the store clerk who testified is a person that I know.
 After leaving Kwik Star, Kehoe drove down the road and stopped to let her boys play at the playground in front of St. Athanasius School. This playground is located directly behind my house (all that separates my yard from the playground is a single row of trees) and my oldest son plays there often. At this point in the time line, Kehoe purposely left her cell phone so that nobody could call for help.
 From the park, Kehoe drove a few miles further to Hook-n-Liner Pond. This happens to be my husband's and my fishing spot (since this happened though, we have decided to find a new spot). It is located in an extremely secluded location so a person would have to be familiar with the area to find it. Kehoe was originally from this area. In fact, the house down the road from it used to be owned by one of her relatives.

Have you ever seen the Oscar winning film, Milk? This article is about the man (Dan White) who murdered the San Francisco mayor, George Moscone, and the board supervisor, Harvey Milk. This case gained notoriety not only because the first openly gay official was murdered but also because many media agencies reported that White beat the murder conviction by using an insanity plea (stating that he ate too much junk food which made him insane). The media nicknamed this defense tactic as  the Twinkie Defense. 
http://www.trutv.com/library/crime/criminal_mind/psychology/insanity/7.html