<human>: Give me a shortened version of the text

Hi Reddit,
I've just returned home from college to discover that there has been a masturbating trespasser in my neighborhood. One night at about 11:30, my mom was watching TV in our kitchen when she saw a hooded figure at the window looking inside. She screamed causing him to flee through the woods in our backyard. My mother called the police, who then tracked him with dogs through the woods to his back door. He answered the door wearing a black hoodie and black jeans. 

The policeman said the dog had a strong scent due to the man's ejaculate which was found in our flower pot. However, this man has no prior convictions and canine tracking is not grounds for the search of a home. Doesn't it seem crazy that they weren't able to search his home/detain him for questioning? Seems like lazy police work to me...

This incident was a few months ago. This past week, my mother discovered what is assumed to be his semen at waist height on our sliding door.

This man lives less than a mile from my house. There have been similar 911 calls from other homes in the area, but nothing is being done. My mother likes to stay up and watch TV at night, but she no longer feels safe to do so. We have installed floodlights in our backyard, but there are blindspots and keeping them on every night gets expensive. We don't have a functioning home security system.

I don't want my mother to be the next victim if this guy decides that looking through windows is no longer enough to get off. Is week old semen good enough for a DNA sample? Could this be used in a civil case? What more can we do to deter this kind of behavior/put this pervert behind bars?
<bot>: dude's been jerkin it to my mom and blowing his load on our windows. What can I do to nail this prick?