6 men are accused of seeking sex with minor after undercover sting

For a recent 11day span, police investigators posed as a 13-year-old on various social media and dating apps.

By the 11th day, six different Bay Area residents — including a high school teacher — had been arrested after allegedly showing up to a prearranged location in Danville for a sexual encounter with the purported child, authorities said. Now four of those six men have been charged, and prosecutors are reviewing cases against two more.

Mahmut Guzelsu, 27, of Benicia; Brady GodseyLally, 27, of Brentwood; and Elmer Ramirez-Lucha, 45, of Pittsburg were all charged with arranging to meet a minor with lewd purposes. But one Concord resident, 59-year-old Alexander Hellmund, faces a more serious charge of attempted kidnapping of a minor. That's because prosecutors allege that he arranged to bring a “13-yearold boy” back to his house for a sexual encounter, unaware the “boy” was really a detective.

The investigation, dubbed Operation Broken Heart, cost one Hayward teacher his job. Joseph Rudolfo Martinez, 38, of Union City was arrested after allegedly sending a picture of his penis to an undercover officer; police say he snapped the photo in his own English classroom. He since has been fired but not yet charged; prosecutors say they still are reviewing the case.

A Hayward resident, James Walsh, 44, also was arrested on suspicion of attempted kidnapping, but prosecutors haven't filed a case against him yet, either, authorities said.

In a written statement, Contra Costa District Attorney Diana Becton said that the Internet Crimes Against Children Task Force — a group of officers from various local agencies — is an “integral part of my office's policies on public safety” and that the undercover stings will continue.