Crime After Crime

"But deep in your heart you know the guilt would drive you mad And the shame would leave a permanent scar '''Cause you start out stealing songs, and then you're robbing liquor stores And sellin' crack and runnin' over school kids with your car"

- "Weird Al" Yankovic, "Don't Download This Song"

Commonly seen in crime dramas, especially of the noirish variety, this occurs when a character or characters, having committed one crime, perhaps one not even that serious, must then commit another crime to cover up the first, and so on, leading to an escalating series of crimes set off by what may have originally been just an accident. If the character had just come clean at the beginning, he might have gotten off with a relatively light sentence. After a little while with this trope, he's looking at death row if he gets caught.

Compare Snowball Lie, Jumping Off the Slippery Slope. Contrast Revealing Coverup. A major cause of Never One Murder. and Plethora of Mistakes...

Anime and Manga

 * In one of The Kindaichi Case Files, "Smoke and Mirrors",  ends up killing three people, and attempting to kill a fourth, to cover up a misdeed many years ago.

Comic Books

 * Steve Ditko's Mr. A stories always revolved around this, the Objectivist moral being that there's no such thing as toeing the line between good and evil.
 * Jean Loring did this as part of DC's Identity Crisis storyline in which she set up a murder and an attack in order to cover up her own accidental killing of Sue Dibny.
 *  Sin City: This happens from time to time, most notably Dwight McCarthy stories since he regularly gets in more and more trouble and technically has to break another law in order to get out of it.

Film

 * Basically the entire plot of Stag, in which the party-goers, having committed two counts of manslaughter in the second degree, spend the rest of the film debating whether to commit first degree murder in order to keep a witness from talking.
 * The plot of Very Bad Things.
 * A Simple Plan is a rather harrowing example of this plot.
 * In the black comedy Big Nothing Simon Pegg's character convinces David Schwimmer's character that nothing could go wrong with their plan to blackmail a local Reverend. Unfortunately no-one is quite what they seem, and soon one thing leads to another...
 * Thelma and Louise. What starts as a act of self-defense ends with a multi-state manhunt.
 * In Otto Preminger's Where the Sidewalk Ends, a Rabid Cop accidentally beats a suspect to death, and ends up inadvertantly framing an innocent man while trying to throw suspicion off himself.
 * The whole film Armored is basically a big example of this trope. The main plot starts off with a plan by a group of six or so armored truck drivers to steal the money they're transporting. The protagonist has more of a conscience than the average felon, but needs money and agrees to go along with it. Things start out alright for them when they take the truck to an abandoned warehouse where they plan to hide the money and then retrieve it after they pretend their truck was attacked. At some point, they decide that they need to blow up the truck in order to hide the evidence, but things still look like they might go off without any major hitches. However:
 * In Bad Lieutenant Port of Call New Orleans a Dirty Cop's life starts to spiral out of control as he has to keep committing new crimes in order to deal with the fallout from his old crimes. And since his old crimes were motivated by massive drug and gambling addictions he hasn't kicked yet, he keeps creating new problems just as soon as it looks like he's solved the old ones.

Literature
""I've heard of the habitual criminal, of course. But I never dreamed I'd become involved with the habitual CRIME.""
 * The Hot Rock (and the movie based on the novel) involves an escalating series of crimes dedicated to stealing a particular diamond.


 * Happens in the Gaunt's Ghosts novel Necropolis. A trader killed some civilians, then killed his bodyguards who helped him kill the civilians, then his aide (or was planning to, at least), then tried to kill the medics of the titular Ghosts who were investigating the murders. Luckily, he was stopped by Gaunt, but one has to wonder how he was planning to kill the 1500+ pissed-off Imperial Guardsmen that would have torn the city apart looking for him.
 * The villains in Murder on the Leviathan first killed ten people in Paris to steal the MacGuffin, then killed a professor onboard the luxury liner Leviathan when he got dangerously close to the truth, then, when the investigation began to catch on,.
 * In the Harry Turtledove novel Noninterference, the head of The Federation's pre-warp civilization Survey organization gets a report from a recent mission that the a violation of the titular Alien Non-Interference Clause had longer-lasting effects than anyone had anticipated. Instead of working on Spin Control (the guy responsible for the initial screwup was cashiered, his mission is used as a case study in What Not To Do, and more to the point he has been dead for over fourteen centuries) she orders the files erased... and goes after the copy downloaded by a xeno-anthropology professor... and tries to shut up the survey team... and tracks down which of the professor's students has a copy....
 * In Native Son, Bigger Thomas accidentally suffocates a white girl in her bed. Believing that society would presume a black man like him guilty of having raped and murdered her, he burns her body and writes a ransom note claiming she's been kidnapped. Before Bigger is tracked down and arrested, he rapes and murders a black girlfriend.

Live Action TV

 * In an episode of CSI, a lawyer enjoys a few drinks and hits a pedestrian while driving home. The victim gets trapped in his windshield, but instead of taking him to a hospital or calling the police, the lawyer hides the man in his garage. In the end, it's revealed that
 * Also, the infamous Max from the episode "Loco Motives". It would have worked out much better for him if he had just called the police and told them he accidentally instead of what he actually did, which involved  and failing in disposing of
 * Well, technically, none of those things were crimes, and its implied they believe him. So he might actually have been let off anyway.
 * In another one there was a taxi driver who ran over a pickpocket who refused to pay her fare and ran off with his wallet,
 * In the series' pilot episode, a thief returns to the house he'd robbed, presumably to clean up some clue to his identity, and winds up.
 * In The Shield, the strike team starts out making a few deals with some gangs to leave them alone while going after their competitors, and ends up to cover up their corruption.
 * Played with, or perhaps subverted in Veronica Mars season one, in which the Kanes commit various counts of conspiracy (mislabeled in the show as obstruction of justice) in order to conceal that Lilly. Well, technically,  and that's why they covered it up. In their defense, they did find him.
 * Prison Break contains several cases of this. Charles Westmoreland even tells Michael at one point that there's no such thing as an ex-con, which Michael repeats sometime in season two when he realizes how many crimes he's been directly and indirectly involved in, since he decided to break Lincoln out of prison. Sucre, C-Note and Mahone are also arguable examples of this, as their backstory gradually reveals.
 * Cold Case
 * An early episode had a guy shoot a man to death, and in attempt to cover it up, he set a fire... which killed at least twenty-two others.
 * In another episode the Big Bad doesn't even kill the victim—he just gets rid of the body to protect the idiot that killed her almost by accident. However, as the investigation goes on, he kills another man to keep the secret and when that also fails, he attempts to kill the detective in charge of the investigation.
 * Monk: Only one episode of did not feature this trope. Usually the villain starts with Murder Is the Best Solution and then just keeps running with it. Nobody with money is ever willing to pay for a divorce and the merest hint of any amount of unclaimed gold/money/treasure can set off a 10-state killing spree. Except for the guy who accidentally killed his mistress (mainly by not calling 911 for help) and then couldn't go through with the cover-up crime of murdering her dog and it's puppies (DNA would prove that his dog was the father, so he must have known her).
 * A favored trope of Law and Order - especially when the defendant has a rich (or mobbed-up) family to bribe, perjure and intimidate his way to an acquittal.
 * In Person of Interest this is usually what gets Finch and Reese involved. The machine is unable to predict impulse crimes but once a crime is committed it can predict that the cover up will involve murders. In the pilot when  the cover up escalates to the attempted murder of a teenage witness and then the attempted murder of the prosecutor looking into the matter. The criminals were willing to escalate things even further since the prosecutor had his young son with him when they tried to kill him and they did not want any witnesses.
 * In Luther, all  needed was some money... but it just snowballed from there...

Theater

 * Older Than Steam: Macbeth is famous for this one.
 * The main character of Hamlet first kills his girlfriend's dad when mistaking him for someone else... then hides the body... then arranges letters so that two of his friends are executed instead of him... by the end of the play nearly every main character is dead. Including Hamlet himself.

Video Games

 * Phoenix Wright: Ace Attorney
 * The bonus case in the first game has this as the motive for Joe Darke in the backstory - a seemingly normal man who accidentally killed a cyclist in a car accident, and then proceeded to go on a killing spree in an attempt to cover up this initial accident.
 * The Big Bad of Trials and Tribulations, who killed their sister to keep her from talking about a fake kidnapping they had staged years ago to steal a jewel from their family. Further details are are a classic example but a big.

Web Comics

 * Girl Genius: Lampshaded and averted in this strip.
 * The Weekly Roll in "The lost virtue of de-escalation". Or, murderhobos being murderhobos.

Western Animation

 * Parodied in the first Futurama "Tales of Interest" episode, in which a What If machine shows what it would be like if Leela (normally the Straight Man) was more impulsive. She ends up killing The Professor for his inheritance and then slowly working her way through the cast as they catch on,