Seattle police known to be at the scene were:
Capt. Larry Farrar
Lt. George Marberg, Lt. Al Gerdes, Lt. Ziminsky
Sgt. Don Cameron, Sgt. Jeff Getchman
Det. Jim Yoshida, Det. Steve Kirkland
Off. Joe Fewel, Off. Von Levandowski
King County Medical Examiners:
Investigator Dave Delgado
Dr. Nick Hartshorne, Dr. Donald Raey

Officers who were present made very little effort to preserve the scene and document it thoroughly; arriving at 9:50am the scene was secured by 11:55am. Perhaps this was corruption or incompetence without intent, either way its negligence. These reports of the scene are clearly based on fact but inaccuracies fill the holes; inaccuracies that paint a suicidal environment.

"Nowhere in the police handling of the scene will you find any indication that the detectives were there to do anything but write up a report on the death and then get out of there... No standard
forensics testing such as fingerprint, footprint, fiber sampling, etcetera, was done at the scene. Homicide detectives were apparently willing to entertain no notion but that this was a suicide." - Richard Lee - "No evidence, it seems, is needed to close a case of alleged self-murder."

From the limited visual view and description the greenhouse appears clinical and does not corroborate with what Dylan Carlson and others have said; “It’s just a dirty little room.” Along with Dylan’s other statement – “I’ve never seen the house this clean before,” these testimonies lead to the suspicion of an intently ‘swept’ crime scene, a fundamental observation in every investigation implying a more complicated scenario.

Nikolas Hartshorne: "The fact that there was a suicide note left at the scene, point one. Point two: the weapon is still at the scene and point three: the nature of the injury. This was a contact shotgun wound to the mouth that required the gun to be against the decedent's chest and with this information makes it a classic textbook example of suicide." (VH1 Confidential)
Point one - when the authenticity of the suicide note is later questioned, Hartshorne claims one factor he pronounced as being a reason in the conclusion of suicide is now "irrelevant."
Point two and three - its logical to suggest that in the reconstruction of a 'textbook' suicide the perpetrate[s] would manipulate the crime scene fabricating the essentials, and certainly in this scene all the artifacts are ideally placed. This is no basis at all to conclude a verdict of suicide without consideration of other variables and inconsistencies present. - 'The perfect assassination looks like suicide'

3D Crime Scene Diagram
This model is not to scale, it is directly deduced from the information provided in the police reports documenting where items were located. Polaroid and 35mm cameras were used to document the scene. The films have never been developed, and to a much lesser extent the polaroids never released - "We don't develop photographs on suicides." Sgt. Cameron.
Therefore the only discernible information about the crime scene is from police reports and witness accounts. (Click on the diagram for an enlarged view, please discern the fact this diagram does not take into account the pitched roof).

The information contained within the police reports draws up a few distinguishing factors...
SPENT SHOTGUN SHELL LOCATION:

• The inverted shotgun distinguishing the orientation that relates to the scene diagram.
Excerpt from the Follow Up Report:

THE NOTE LOCATION: 

"Gary Smith, who happens to be a journeyman electrician with no alcohol or drugs or criminal record in his background, also reports that a note was clearly visible by the body, so clear that he could read: "I Love You... I Love You" through the french windows. When the details filtered out to the press it seemed as if Kurt had placed the note in a planter box with a pen stuck through it (as reflected in the police reports). In reality the police photographer moved it across the room to get a better shot of it and failed to photograph it in it's exact original position near the body."
- A passage taken from Hank Harrison's book, Beyond Nirvana, p54.
This apparently originates from conversation between Grant and Smith, which Grant later divulged to Harrison.
The importance being Smith's testimony is an eye witness illustration of police tampering with material evidence.
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MISINFORMED SUICIDAL TRAITS:

Although these factors all seem small, they were widely proliferated around the death of Kurt and had an impact by misleading people to draw conclusions as to what had happened on false facts.

1.) Namely the positioning of a stool. It was reported at the time Kurt had barricaded himself inside the room: Police narrative: "There are stairs on the west side leading to the french door entry and another set of french doors on the east side which lead to a balcony. These doors are unlocked and closed but there is a stool with a box of gardening supplies on it in front of the door." - "Off. Levandowski observed the french doors at the opposite end of the room were blocked by a stool; preventing access."
This factor should have been of little relevance, the stool was only sitting infront of an unlocked set of doors that led to a balcony. Not only that, but the eastern french doors open outwards onto the balcony, this makes the notion of a barricade (suggesting nobody could leave) completely irrelevant; an assailant could exit and draw the stool up close to the door before shutting it.
The west entrance french doors were not blocked; Although locked, this was a simple twist lock which can be locked prior to leaving. Tom Grant's explanation

April 15th, Grant met with Sgt. Cameron to discuss his suspicions and mentioned the lock on the western door does not qualify in concluding Kurt was alone, to which Cameron replied - "There was a stool wedged up against the door" - False. The misconstrued media myth of a barricade prevailed.

2.) A recognised mannerism in violent suicide is to leave a form of identification readily available. It was reported by the media that Kurt had infact left his wallet open displaying his drivers license. This is completely untrue, in reality the closed wallet was opened by an officer - "SFD asked for I.D. from the nearby wallet, and I opened the wallet which was within a couple of feet of the victims body. Inside I found a Washington state drivers license in the name of Cobain, Kurt Donald DOB/022067".

3.) Reports documenting a crime scene should be described factually, without bias and final conclusions. In this case it obviously wasn't; the note left at the scene was claimed to incite suicide and was written to Courtney and Frances explaining "why he had killed himself". These remarks were pronounced before a clear evaluation could have been made and were taken as fact.

These small points which indicate manipulation of the factual crime scene were leaked to the hungry media and deceptively confirmed this as a suicide in retrospect.
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BLOOD POOL?

According to police reports there was "obvious trama" to the head but no exit wound, resulting in "a large drying puddle of blood to the left of the victim." - Was the volume of blood ever seriously evaluated in relation to the nature of the injury? Gary Smith who initially mistook the body for a mannequin because it looked so neat only realised the situation when he noticed blood in the right ear. Does this picture sound feasible for a shotgun wound to the head suicide? Clearly we have no pictures that display whether the pool was sufficient or non-sufficient for the type of wound made this is merely an assumption based upon Smith's perception.
In the case of a gunshot wound to the head the wound continues to issue copious amounts of blood for a short period due to the autonomic function of the heart. There are other factors this is reliant upon such as the angle of the shot, all of which we do not yet know, inclusive of the autospy report.
This is best demonstrated by Bud Dwyer, who committed suicide on camera during a press conference (viewer discretion is advised, this is vivid imagery). The comparative lack of blood for this type of trauma is an indication that the gunshot might have been administered post-mortem, the heart had already stopped; the result of a lethal dosage of heroin, and possibly blood coagulation already begun. The supposition that no exit wound would result in a lack of blood is false, as seen in Bud Dwyer's case the exit wound is irrelevant to the volume of blood lost. In addition the destruction to the palette of the mouth would be comparatively larger when factoring in a shotgun.
This scenario would either assume corruption on the part of the medical examiner who performed the autospy; Nikolas Hartshorne, or severe incompetence, as the picture is very different if a wound is delivered post death. The question being could the perpetrate[s] foreshadow a non-investigation by the police unless they knew someone had the power to cover it up beforehand?

It is very possible the shotgun wound was administered while Kurt was under sedation, in this case the cause of death would be a perforating shotgun wound to the mouth.
Just something to consider...
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   MISCELLANEOUS:

   Contents of Cigar Box
   "The cigar box contained narcotics paraphernalia    (syringes, burnt spoons, cotton, and small pieces        of what looks like black tar)."

   Featured in the picture is the open Tom Moore
   Cigar Box, along with the wallet and towels

Contents of Kurts front pant pockets:
• $63
• a piece of note paper with "Seattle Guns, 145 & Lake City" written on it. Another note which read; "Remington 20 gauge, 2 3/4 shells or shorter, set up for light load, 1088925."
• an address book and miscellaneous papers.
• a copy of a Delta plane ticket, #788F. Dated 4/1/94, seat 2F, in the name of Cobain/Kurt.
Pocket of the brown corduroy jacket:
• Receipt for the purchase of the Remington 20 gauge shotgun dated 3/30/94.