Mr. E's Affair
Answer: BOLT FROM THE BLUE

The story in this puzzle includes several malapropisms (playfully clued by "Miss Heard"), each of which can be corrected by a letter transformation:

StoryMalapropismCorrectionTransformation
Mr. E stops by a bakery on his way home.
The murderer is going to get their just desserts soon enough, just as soon as Mr. E can get his own desserts.JUST DESSERTSJUST DESERTSdelete S
He eyes the cakes in the window. Sigh.
His doctor has been nagging him to cut down on sugar, so he purchases a large sandwich and cuts to the cheese.CUTS TO THE CHEESECUTS TO THE CHASEEE -> A
As he eats, he spreads his notes out on the table.
Time to detect.
He knows the real murderer is trying to pin the crime on Billy, who makes an easy escape goat.ESCAPE GOATSCAPEGOATdelete E
If only Billy had stuck around to clear his name; someone needs to find a way to make that kid tow the line.TOW THE LINETOE THE LINEW -> E
With the right mentorship, he could be a real goal-getter.GOAL-GETTERGO-GETTERdelete AL
Maybe this was his own fault.
Maybe he shouldn't have gotten so excited about the fingerprint evidence and scared away his only witness.
He needs to learn to curve his enthusiasm.CURVE HIS ENTHUSIASMCURB HIS ENTHUSIASMVE -> B
He chews on his sandwich thoughtfully.
Everything would be so clear in his mind if he could only figure out how the murderer managed to flee the scene undetected.
He pores over the images from the crime scene again.
There must be something he missed—of course!
The murderer escaped in a wheelbarrel!WHEELBARRELWHEELBARROWEL -> OW

Now apply these transformations, in order, to the string given at the bottom of the puzzle:

Current stringTransformation to apply
SEVWWELLFEELSROMETEELSHEWVWELUWdelete S
EVWWELLFEELROMETEELHEWVWELUWEE -> A
EVWWELLFALROMETALHEWVWELUWdelete E
VWWLLFALROMTALHWVWLUWW -> E
VEELLFALROMTALHEVELUEdelete AL
VEELLFROMTHEVELUEVE -> B
BELLFROMTHEBLUEEL -> OW
BOWLFROMTHEBLUE

The result is BOWLFROMTHEBLUE, a malaproprism for the final answer, BOLT FROM THE BLUE.