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Press Release

Former Commercial Pilot Found Guilty of Internet Stalking

For Immediate Release
U.S. Attorney's Office, Western District of Texas

SAN ANTONIO – A federal jury convicted a Chesterfield, Missouri man today for internet stalking.

According to court documents and evidence presented at trial, from May 2020 to September 2020, Mark Joseph Uhlenbrock, 69, with the intent to harass and intimidate another person, used the internet to engage in a course of conduct that caused substantial emotional distress to his victim.  This course of conduct included posting nude photographs of the victim on the internet without the victim’s consent.  The conduct from this crime occurred while Uhlenbrock was still on supervised release for a 2016 federal conviction for internet stalking the same victim.

In 2016, U.S. District Judge Xavier Rodriguez sentenced Uhlenbrock to 41 months in federal prison, followed by three years of supervised release, after Uhlenbrock plead guilty to internet stalking.  As part of his plea in that case, Uhlenbrock admitted that from January 2006 to August 2015, he caused substantial emotional distress by posting nude photographs of his victim on the internet without the victim’s consent.

Uhlenbrock is scheduled to be sentenced on August 30, 2023.  He has remained in federal custody since his arrest on December 10, 2020, for violating conditions of his supervised release.

U.S. Attorney Jaime Esparza of the Western District of Texas and FBI Special Agent in Charge Oliver E. Rich Jr., made the announcement.

The FBI is investigating the case.

Assistant U.S. Attorneys William Calve and Karina O’Daniel are prosecuting the case.


Updated May 16, 2023