NEW YORK (CBSNewYork/AP) -- There were new developments Friday in the case of missing college student Lauren Spierer, of Westchester County.
Corey Rossman, said to be the last person seen with Spierer, reportedly submitted a DNA sample to police in Bloomington, Indiana. Rossman is one of 10 people labeled "a person of interest" in the case.
However, according to a published report, Rossman's lawyer, Carl Salzmann, has not confirmed whether a DNA sample was given. He would only confirm that his client is cooperating with authorities without getting into the specifics.
Police have said Spierer, who attends Indiana University and is from Greenburgh, was last seen by a friend -- who they did not name -- as she walked to a corner near his apartment about 4:30 a.m. June 3. They have dismissed media reports that Spierer was involved in a fight the night she vanished.
However, Salzmann said his client was punched in the face by someone at her apartment complex. Salzmann said Rossman doesn't know who punched him and doesn't remember the incident or what happened after.
Salzmann also claims Rossman was not the last person to see Spierer. He said Spierer accompanied Rossman to his apartment after he was hit, his roommate put him to bed and she left. The roommate and others saw her hours later, the attorney said.
Police have searched Rossman's Jeep Grand Cherokee and examined his credit card and cell phone records, Salzmann said.
WCBS 880's Catherine Cioffi With Comment From Bloomington Police Lt. Bill Parker
Meanwhile, Spierer's disappearance is set to be featured on the TV show America's Most Wanted Saturday as crews and volunteers continued to look for the missing 20-year-old.
According to the America's Most Wanted website, Bloomington Police say Lauren and Rossman, left a bar together that night and were seen on surveillance cameras returning to Lauren's apartment building around 2:40 a.m.
But police say the two never went upstairs and eventually left the building to go to a friend's apartment a few blocks away, according to AMW.
Hundreds of volunteers continued to help in the search and on Thursday, divers scoured an Indiana lake for a second day.
A $100,000 reward has also been offered for her safe return.
If you know anything about Lauren's disappearance, call 1-800-CRIME-TV.
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