Instructions: Given a document, find the main entity about whom the author is writing. Write the full name if mentioned in the text. Note that URLs in the text have been replaced with [Link].
Input: Ahead of a potential First Amendment showdown Wednesday in the cityâs most closely watched murder case   a lawyer for independent journalist Jamie Kalven  says an attempt to force  his  testimony amounts to little more than an âunjustified fishing expeditionâ by indicted Chicago police Officer Jason Van Dykeâs attorneys.
Van Dykeâs attorneys have alleged that  Kalven  â the first journalist to detail the fatal shooting of Laquan McDonald â received leaked documents containing legally protected information.
âGiven the fatal lack of evidence to support Defendantâs lynchpin factual claim  one is left to wonder the perceived point of (his) efforts â Matthew Topic   Kalven âs attorney  wrote in a document filed Tuesday.
 Kalven  is expected to be in court for the 9 a.m. Wednesday hearing  but it is unclear if he will be called to the the stand. He has vowed not to disclose sources.
None of the filings on this issue by Van Dykeâs legal team have been made public. But at a court hearing in October  the officerâs lead attorney  Daniel Herbert   alleged that  Kalven  obtained leaked documents containing information protected by long-standing legal precedent from being used against Van Dyke in a criminal case.
Herbert suggested that  Kalven  used that information to interview witnesses â with the assistance of the FBI â in a way that shaped the witnessesâ statements to authorities.
In court filings   Kalven âs attorney called Herbertâs efforts âscattershot  unsupported and irrelevant.â The only reports about the case in  Kalven âs possession were obtained from the city through Freedom of Information Act requests more than a year after the shooting  according to Topic.
In addition  as a journalist   Kalven  cannot be forced to disclose  his  sources except in certain specific circumstances   his  attorney stated.
Output:
Jamie Kalven