Journal According to The Investigators

Point of view of The Investigators:
There is nothing out of the ordinary in this house, our fellow officer Patrick died in the house, his wife seems awfully depressed.
From the looks of it, i think that Patirck has die due to a hit to his head. I think that the murder weapon is somewhat the size of a sewage pipe, probably very strong aswell.
(After looking around in the house for the weapon and evidence)
No murder weapon found so far, it seems that Mrs Maloney is cooking a lamb leg. Seems like the leg has been there for quite a long time. According to our experienced investigator, Patrick has been dead for 5 hours.
Unusual. No blood stains have been found, how can this be? it seems that internal bleeding caused his death, this shatters my hypothesis that the murder weapon was a sewage pipe. now it seems to be something softer but still quite stiff.
(After some time)
Mrs Maloney offered us the lamb leg she cooked. Said no but we cannot resist it, im extremely tired. So all officers decided to eat the lamb leg. Strange, Mrs Maloney giggled. How can she giggle when she is so sad.
(After eating)
Questioning Mary. She said that she was at the grocers, then went home to find Patrick lying on the floor. (its later now, probably the grocer has gone home, i will find him tomorrow)
Mary asked me if i could take the garbage out, i agreed. Looking into the garbage can, i can see the lamb leg. Wait! there is a fracture on the shin of the lamb leg. form what i know, lamb leg can withstand alot of weight. If it fractures it means that the was a huge impact. Patrick died from a hit, the lamb shin bomb is hard yet the meat is soft! Mary is a prime suspect!
(The next day)
I went to the grocers, he showed me the receipt, time was almost half hour after Patrick's death! Mary must be the murderer! Now i have to convince the others.