St. Petersburg police have launched a large-scale search in connection with a cold case, but officers aren't saying which one.
On Tuesday, law enforcement drained a small retention pond near 71st Street N. and 52nd Avenue N.
St. Pete police confirmed they were acting on a tip.
Pinellas County Sheriff's deputies are providing forensic assistance to the police department.
Investigators were seen using shovels and construction equipment.
Police declined to say what they were trying to find.
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