Police in Illinois have opened a death investigation after the body of a 51-year-old man was located in a lake in Arlington Heights.

The Cook County Medical Examiner’s Office identified the person pulled from Lake Arlington on Friday as Albert Vorobiev, according to Fox 32.

The Arlington Heights Police Department received a 911 call on Friday from the Arlington Heights Park District staff after personal belongings were found near the sailboat launch at Lake Arlington, police wrote on Facebook.

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Officers responded to the scene and discovered a vehicle belonging to the personal property owner in the parking lot. Officers learned that a family member recently reported the victim as missing to Wheeling Police over concerns for his wellbeing.

A total of 25 chief fire officers, divers and paramedics responded to the scene to assist in the search. The park was closed and all occupants were required to leave as the search was underway.

Arlington Heights and Wheeling police launched respective drones to search over the water, shoreline and wooded areas. Officers on the ground or riding in cars or motorcycles performed a grid search of the ground.

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Dive team specialists used sonar technology that was deployed by a fire boat and supported by scuba divers searching underwater. At about 11:15 a.m., sonar identified an anomaly roughly 30 feet offshore from where the personal belongings were discovered.

Divers investigated the area before locating and recovering a body from the water.

Paramedics assessed the body and determined there was no possibility of resuscitation. 

A woman diagnosed with a rare medical condition has her quick-thinking service dog to thank when a health episode strikes. 

A symptom of Katie Graham's POTS condition – postural orthostatic tachycardia syndrome – affects the blood volume when standing up. Australian shepherd Bailey is trained to detect when Graham's heart rate rises to an "unsafe" level through smell. 

As seen on video, when Graham stands up, Bailey alerts his owner by jumping on her and getting her to sit down. The rescue pup can then retrieve her water and medication. 

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"He has such a drive that nothing will get in his way," Graham told "America's Newsroom" Friday.

Graham said Bailey recognizes her unsafe heart rate level through scent. She said the body gives off a certain pheromone when experiencing stress and sudden changes. She taught Bailey how to recognize that pheromone, and when he smells it, he knows to react. 

Graham said she trained Bailey herself after getting him at eight weeks old. 

Bailey also provided deep pressure therapy to help circulate Graham's blood flow. She explains that many POTS patients experience fainting episodes because of blood pooling.

POTS affects .2% of Americans, with 75%-80% are female, according to the National Library of Medicine. 

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Graham told co-host Dana Perino that due to the recent discovery of POTS, finding a POTS-specific service dog is difficult. However, she said finding the right tempered dog and a good trainer can allow for a great service dog like Bailey. 

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