Madrid, Spain (CNN) -- The family of an American college student who has been missing for more than a week in Madrid has hired private investigators from California to help search for him, the student's father told CNN on Monday. A small team of investigators from the Halo Corp. is due to arrive in Madrid on Tuesday to search for the San Diego State University student, Austin Taylor Bice, who went missing after a night out with friends, said his father, Larry Bice. Halo's website says it is a San Diego-based company "founded by former special operations and intelligence personnel."
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Missing-person posters appearing in Madrid and on Spanish media
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Austin Taylor Bice, 22, was last seen outside a Madrid disco February 26
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Bice's father has come from the U.S. and says he plans to stay "as long as I need to"
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The student's father rushed to @placeholder from San Diego last Wednesday and has since met several times with Spanish and U.S. authorities.
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The posters list two phone numbers -- a friend's cell phone and a police office line -- but the elder Bice said new posters will go up listing two national emergency phone numbers in @placeholder.
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The student was carrying two credit cards and his @placeholder driver's license, his father said.
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It said there were about 17,000 @placeholder students in Spain.