Joseph Moura, president of the National Investigation Bureau, took on the case Dec. 21.

An investigative consultant with the CBS TV show “48 Hours,” Moura has been running his Stoughton-based detective agency for 27 years and has worked on many missing-person cases, including the high-profile 2007 disappearance of 3-year-old Madeleine McCann from a resort hotel room in Portugal.

Lastovkin, 22, was last seen Nov. 12, as he left his Memorial Drive home at about 6 a.m. Authorities have said foul play is not suspected.

Moura said a credible source reported seeing a man resembling Lastovkin walking on Route 138 in Stoughton on Nov. 15. The information was investigated by Stoughton police at the time but did not lead anywhere.

Acting Stoughton Police Chief Thomas Murphy said there have been no new leads since.

The sighting report gave the family hope that their loved one, who last year experienced a bout of depression, could be staying with someone or might have checked himself into a shelter or health facility, Moura said.

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