Quest Red

In Virginia, three people are all fatally shot by a gunman knocking at the front door. Detectives use security footage to help track down the killer.

See how arson investigators gather physical evidence and mount undercover and sting operations to crack insurance torchings and arson murders.

See how, in the 1993 World Trade Center bombing, DNA was traced to the bomber through the saliva that remained on the back of a mailing label.

An elderly woman is beaten to death in her Texas home. The only clues are a trail of strange credit card transactions - and surveillance video.

A 13-year-old boy comes home to find his stepmother murdered and his 15-year-old sister missing. Police race to piece together a killer's video trail.

Katie had a serious illness that hit her confidence - but it won't stop her dream of a princess dress. Carina wants a modern frock but her mum prefers traditional.

Lacie wants a glittery princess dress with the 'wow' factor - will it work for a hot Cyprus wedding? Debra seeks a sexy mermaid-style frock to renew her vows.

Former bass player for Prince, Nik, needs a one-of-a-kind dress for her aerial wedding. Teddi's wedding is only a few months away. Will the dress be ready in time.

Morticia Addams In A Good Way. Hayley Paige helps a bride wanting to look like a creepy fairy. Plus, a bride with a penchant for pickiness admits to already trying over 150 dresses.

Drugs cure disease and ease pain, but can also be used in murder. Toxicologists uncover cases where death is not as natural as it seems.

When firefighter Bob Poynter is killed, no-one appears more devastated than his young wife, Chacey. But soon detectives discover a web of lies.

Everyday substances can reveal hidden clues that break a homicide case. One case is disproved when cyanide is found in a woman's blood stream.

Most victims of multiple murderers have a link with the killer or match their set of criteria. But some murders occur when victims appear to be picked at random.

Killers often try to deflect attention from their crimes by hiding the remains of their victims. Visit two cases where bodies lay hidden for years before being found.

A hopeful soap opera star shines in the background - but her rise crashes instantly because someone doesn't want to see her succeed.

A runway model turned mom-a-ger lived a fairytale life of luxury. When she turns up dead at the bottom of her pool, police uncover deep motives.

Tara Correa-McMullen was only 15 when she rose to fame in Hollywood. But a romance with the wrong person takes her out of the spotlight forever.

Jam Master Jay, best known as Run-DMC's DJ, was killed in his recording studio. An exclusive interview with an eyewitness sheds light on this decades-old cold case.

A deputy sheriff turns in his badge to pursue a career in acting. When a shooting leaves him injured and his wife dead, police learn there's more to this court TV star.

When police find a fashion designer dead at an exclusive members-only hotel, they must untangle a twisted web of who's who in the New York scene.

An affair is exposed, ending in tragedy. Police arrest the suspect and discover the killer's cover-up. Plus, how an arrest solves two crimes at once.

A gunman shoots a firefighter dead in his driveway. Police focus on the unusual firearm used and follow a trail of clues left behind by the victim.

Shana Grice was murdered after being stalked by her ex-boyfriend, Michael Lane. He denied involvement, but experts examine police videos to determine the truth.

Discover how a few milligrams of forensic evidence can be crucial to a crime investigation and prove the innocence or guilt of the accused.

Exploring the mind of the obsessive murderer, following the work of psychologists as they study the muddled workings of the criminal psyche.

A Minnesota woman vanishes from a mall after a date with her estranged husband. A shocking discovery in a parking lot leads police to CCTV footage.

At the scene of a traffic accident a teen is dead at the wheel of her car. An autopsy reveals a sinister crime - will CCTV footage find her killer.

Glamour girl Hannah wants a glitzy gown to rival a Kardashian - can David get the bling on budget? Doctor Eve longs to ditch her scrubs for a lace dress.

No-nonsense bride Amy knows what she wants - will she trust David to take the reins? Control freak Emily wants an open-back gown that gets the tears flowing.

Angelica searches for the perfect strapless gown, but her mum, who is paying for the dress, has other ideas. Will she have to compromise to please mum.

Bride Lyndzie believes she was royalty in a past life and wants a regal, form-fitting wedding dress. Plus, Ashley wants a sexy gown that won't shock her mum.

Learn how 20th century techniques encourage people to revisit the past to answer questions and reexamine and solve ancient crimes.

Within weeks of their wedding, a debt-ridden wife recruits a team of teenagers to help her get her hands on her husband's life insurance policy.

A convicted bank robber and his partner in crime escape on their way to court and go on to make the biggest bank robbery in Wisconsin history.

When police officers respond to a domestic disturbance, a fleeing suspect fires at them. Fingerprints and an FBI investigation lead to the criminal.

When a record store clerk is shot and killed outside a bank, surprising clues left at the scene indicate that robbery was not the motive.

Sam Dreher and his wife are the perfect couple. But when Sam falls in love with another woman, his affair triggers a chain of events that spirals out of control.

When Ashley Pegram goes missing after meeting a man through a dating app, police discover she is caught up in a nightmarish trap set by an online predator.

Wrong. When Nikki McPhatter doesn't show up for her usual work shift, her friends immediately worry - and point investigators to her online relationships.

When two young men are shot dead, detectives turn to digital forensics, hoping hidden data buried in the victims' cell phones will help track down the killer.

When family man Ricky Saxton is found murdered, Investigators turn to a forensic data specialist at the FBI to help locate a missing piece of the puzzle.

When single dad David Heisler goes missing, clues lead detectives into the desert, but the trail stops cold. Digital forensics experts to help unravel this mystery.

Kevin Lewis's refusal to let go of his ex-wife triggers a series of events involving a teenage hitman and an obsessed lover ending in tragedy.

A father sees the warning signs, but nothing prepares him for the horror to come when his son brutally murders his own five children.

In a rage, Ben Butler killed his young daughter, Ellie, but along with his wife faked a 999 call and protested innocence. Experts analyse their interviews.