BOLLINGBROOK, Ill., Dec. 6 (UPI) -- Investigators in the Stacy Peterson case in Illinois issued warrants to examine GPS records and search for "evidence of the offense of first-degree murder."
A police warrant obtained by the Chicago Tribune calls for the seizure of objects that "have any of the following on them: blood, hairs, fingernails, bodily fluids, body tissue, DNA, fingerprints, fingernail scrapings, palm prints, saliva, urine, feces, or other biological material which may be evidence of the offense of first-degree murder."
The warrant issued Tuesday also broadens the investigation into information obtained from the GPS system onboard Drew Peterson's sport utility vehicle.
Police consider Drew Peterson, a retired Bolingbrook, Ill., police sergeant, a person of interest in the disappearance of his fourth wife, Stacy, 23, missing since Oct. 28.
The new warrant comes as police divers continue to search for evidence and comb through debris in a canal located near the home.
An attorney familiar with the case told the Tribune that the warrants suggest police investigators have solidified their investigation
Authorities also are re-examining the 2004 death of Drew Peterson's third wife, Kathleen Savio.
