Joe Dziemianowicz

At Chagrin Valley Dispatch, featured in "911 Crisis Center," dispatchers handle all sorts of unique calls.

"An Unexpected Killer" returns to Oxygen with all new episodes, including one about the 1979 murder of Savannah Anderson.

Handling unpredictable emergencies is the job for the rookies and the veterans at a busy Ohio dispatch agency featured in "911 Crisis Center." Meet some of them.

Could Lula Young's “best friend” actually have been the brains behind her murder in Mississippi?

De-escalation is a big part of the job for emergency dispatchers, as seen in "911 Crisis Center."

From life-or-death threats to wild turkeys, 911 dispatchers are trained to handle any situation.

Tyvon Whitford, a pregnant Florida woman, was shot to death in her home. Who pulled the trigger?

Carolyn Exum was the popular girl in high school, whereas Allen Browning wasn't. When they started an affair together, she was able to convince him to get rid of her husband for her.

Cleveland serial killer Anthony Sowell's younger sister faced rage and “death threats” because of his gruesome crimes. 

The tally for arrests following “Cold Justice” investigations keeps growing.