Haunted (Retro)

[CRNDLSM]

Deadbolt the doors, the killer is coming.
Not that it matters, soon they'll all be dead.
Break-in the window while thunder's drumming,
no time to dodge a sharp blow to the head.
Quiet, but air conditioning's humming...
one more minute and the killer has fled.

Once the dawn broke, the neighbor went inside.
'Dead on the doormat,' describing the scene,
'Quite horrific, she was so young!' she cried
not too dramatic for this gossip queen.
No evidence treachery was implied,
breaks in this case were completely wiped clean.

Braking hard, roads wet, the Cadillac swerved 
one second too late for a head-on crash.
No trace was left, even the money burned.
Dead, the killer was now one with his cash.
Nodding together, detectives discerned
quite incriminating facts from the trash.

Quiet so as not to scare him away,
break-ups a motive, the boyfriend was rough.
Not that an ex-con is prone to foul play,
one only hopes they'd avoid more handcuffs.
'Dead inside, dead to the world,' he would say,
'No way I ever could have done that stuff!'

Knowing full well he hired the assassin,
quite well aware he could go to prison.
Dead-ended life, the price for his passion.
Breaks won't come easy, he's unforgiven,
wondering who'll care, head-strong, he fastens
knots in the string, his silent admission.

Not that it matters, since everyone died.
Notice the neighbor who made the first call?
One by one, all of the lovers she spied.
Quite content when she saw the bloody sprawl.
'Break moral laws, whores are the Devil's bride.
Dead's where they belong, to hell with them all!'

Deadly poison braking free, shes taunted
by quiet naughty influence undaunted.
No one's suggested, the house was haunted,

[TranquillityBase]

Deadbolt the doors, the killer is coming.
Not that it matters, soon they'll all be dead.        "they'll all be dead" confused me, since there seemed to be only one victim.  I'm now understanding it includes the killer.         
Break-in the window while thunder's drumming,
no time to dodge a sharp blow to the head.
Quiet, but air conditioning's humming...
one more minute and the killer has fled.

Once the dawn broke, the neighbor went inside.
'Dead on the doormat,' describing the scene,
'Quite horrific, she was so young!' she cried
not too dramatic for this gossip queen.
No evidence treachery was implied,                       should there be a comma after "No evidence"?
breaks in this case were completely wiped clean.

Braking hard, roads wet, the Cadillac swerved 
one second too late for a head-on crash.
No trace was left, even the money burned.         at first reading, the cash confused me, since it seemed a simple murder.  I now read it as the killer's payment.
Dead, the killer was now one with his cash.
Nodding together, detectives discerned
quite incriminating facts from the trash.

Quiet so as not to scare him away,
break-ups a motive, the boyfriend was rough.     break-up's?   that is, a contraction of "break-up is"
Not that an ex-con is prone to foul play,
one only hopes they'd avoid more handcuffs.
'Dead inside, dead to the world,' he would say,
'No way I ever could have done that stuff!'         assumed the boyfriend was innocent on first reading.  guess I overlooked the next line.

Knowing full well he hired the assassin,
quite well aware he could go to prison.
Dead-ended life, the price for his passion.
Breaks won't come easy, he's unforgiven,          don't?
wondering who'll care, head-strong, he fastens
knots in the string, his silent admission.               my favorite bit

Not that it matters, since everyone died.        well, not everyone....the boyfriend's not dead yet
Notice the neighbor who made the first call?      this (and following lines) made me think the neigbor did it on first read
One by one, all of the lovers she spied.
Quite content when she saw the bloody sprawl.
'Break moral laws, whores are the Devil's bride.
Dead's where they belong, to hell with them all!'

Deadly poison braking free, shes taunted       she's?
by quiet naughty influence undaunted.        "naughty" doesn't seem a strong enough word here
No one's suggested, the house was haunted,  I assume the comma at end is just an oversight, but at first I thought you'd left some of the ending off since it's only 3 lines.

Hi C.,

I've now read this enough times that I think I understand the narrative, so most of my notes are about why I couldn't quite follow it on a first reading.  I don't know if that's any help, but that was my biggest difficulty with it.  Admittedly, I'm not a very perceptive reader first time through any poem.

Anyway, it's very descriptive and entertaining and rhymes well (a real feat in my opinion) now that I "get it".  At least I hope I do 

TqB

[CRNDLSM]

It's a sestina where I repeat the first words, I might need to change string to noose so that the boyfriend hangs himself. The last three lines are the worst, most difficult, I was trying to make the neighbor drink a poison under the haunted house's influence, might need to pick a different end rhyme or maybe I can just add three more lines. Thank you so much for the help