I had just killed someone when my policeman boyfriend,Alex,came home from work.
He said, sounding a bit annoyed, “We've been outwitted by him again.”
I looked up at him with a guileless expression.

Yes,I was the"him"my boyfriend was talking about.
My name is Amanda Brown,and I'm a psychologist.
I'm also a serial killer.
I had calculated the exact time he would step into the house.
I had just wrapped the body in plastic sheeting and stuffed it into the hidden compartment under the bedroom floor when I heard the sound of keys unlocking the door.
I calmly smoothed out the wrinkles on my clothes,let my hair down,and reached for the perfume on the table. I gave my wrists a couple of spritzes..

I put on my glasses,walked into the living room,and greeted him with a big smile,"Why are you back so late?" I asked.
I put my arms around his waist and leaned my head against his chest.
He ran his fingers through my hair and said, sounding a bit annoyed, “We've been outwitted by him again.”
Leaning against his chest, I couldn't help but smile triumphantly.

I looked up at him with an innocent expression, pretending to know nothing.
He let out a sigh and said,"Based on the pattern of the previous crimes, he should have struck again today."
He ran his hands through his hair,sat down on the sofa,and looked visibly frustrated.
Yes,I was the"him"my boyfriend was talking about.
I'm Amanda Brown, an accomplished psychologist and a notorious serial killer.
The person I killed tonight was already my"seventh"victim.
As a criminal with exceptional psychological resilience,I have a very regular crime pattern.I always commit my crimes on the 25th day of every odd-numbered month.
The first crime took place on January 25th,the second on March 25th,and so on.There is a clear pattern emerging.
I usually dispose of the body three days after the crime,and today is the 25th.
I bet my boyfriend never imagined that the seventh body was right under the floor of the bed where he sleeps every night.
My boyfriend and I had been together for almost a year.
We first met at the scene where I disposed of my second victim.
His name is Alex Thompson.Since the first body was found,this case had been assigned to him.
He was renowned as a prodigy in the police force.I really wanted to see how skilled he was.
He took me back to the police station to make a statement, claiming that I had seen the appearance and figure of the person who disposed of the body.
This move not only made me a witness with a clean background,but it also brought us together, and our relationship grew warmer.
By the time the third case occurred, we had already been together for a month.
And all of this had been meticulously planned by me.
After all, the most dangerous place is often the safest.
The feeling of"hiding in plain sight"is really great.
There is nothing better than lurking beside the police officer investigating this case to clear my name.
Alex will never guess that the serial killer who's been tormenting him for a year has been sleeping right beside him.