The credibility of the prosecution's key witness in a murder-for-hire trial is being called into question.
Stacey Seaton, 17, was shot in a park behind her Bowie, Md., home in June 2005. She died at an area hospital
McDonald Abraham, who pleaded guilty in the case, testified Tuesday for the prosecution that he paid Jarvis Tyler $600 in cash and marijuana to kill Seaton.
Tyler's defense attorneys say he's only cooperating with prosecutors so he can get a lighter sentence.
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