Michaela "Mickey" Shunick, 21, a senior at the University of Louisiana, was last seen leaving a friend's house near campus just before 2 a.m. May 19.

Detectives said surveillance video from local businesses shows a woman believed to be Shunick riding her bike after leaving the home.

Police said they are now looking for the driver of a white pickup truck that was also seen driving along the same streets a short time later.

Louisiana authorities release surveillance video of a truck seen in the same area where Mickey Shunick was last seen riding her bike.

Shunick's bicycle was found Sunday under a bridge in a swampy area about 25 miles from where she was last seen, police said.

Bloomington police Capt. Joe Qualters said that his department had contacted Louisiana authorities regarding similarities between Shunick's case and that of Spierer.

"We have made contact with officials in Louisiana and are waiting for a return call," Qualters said in a news release.

Shunick is described as white, 5 feet 1 inch tall and 115 pounds with blond hair and blue eyes.

Spierer, 20, was described as 4 feet 11 inches tall and 90 pounds with blond hair and blue eyes when she was last seen on the morning of June 3 walking in Bloomington after a night of partying with friends.

Bloomington police early on ruled out a white pickup truck caught on surveillance video driving by the area that Spierer was last seen.

Police at first thought the truck circled the block suspiciously, but said they later determined a time discrepancy between video cameras was the reason the truck appeared to go by twice.

Sunday will mark one year since Spierer was last seen.

Police released a picture of a truck seen in the area where Lauren Spierer was last seen.

Qualters said his department had not yet received a call back regarding the Louisiana case.

"That agency may be fielding inquiries from other law enforcement agencies investigating missing persons cases, and we will just have to wait our turn," Qualters said.