Forensics

Gun point Was it suicide or not, the main proof is how the gun ended up on the desk, on safety. And it's extremely unusual for a suicide to occur where, someone kill themselves in the back of the head. Peter was also at a high suicide risk, as we'll as his older brother had comit suicide. The gun could have landed on the mouse pad and triggered the safety. Burning Gasoline was thought to be used as an excellerent for a fire. The fire was caused by pollution? And thus the girl was killed cause of that one clumsy mistake.