This is an open letter to Mayor Michael Bloomberg with regard to the Staten Island Advance article of Oct. 28, "Fatal encounter for deer on Hylan." What I cannot believe is the insensitivity of the police, who stated they would not pursue him or her, the driver of the pickup who murdered a poor, innocent 2-year-old buck who was scared and confused. The person driving the pickup didn't even stop. There has got to be blood on his pickup and probably body damage. To me, this is a hit-and-run resulting in the death of an innocent animal. The person that did this knows what he or she did. Are they stupid? Have they no guilt or were they too busy on the cell phone? How could they not notice a deer in the middle of the road? Mr. Mayor, both the director of New York State Parks at Clay Pit Pond and I have asked for years for the Department of Transportation to put up signs saying "DEER CROSSING, CAUTION." Their response was "It's not warranted." Our request for signage was along Arthur Kill Road and along Route 440. But yet you see new signs going up all over the Island, "DON'T HONK. $350 PENALTY" or the "CHILDREN CROSSING" signs. Some blocks have eight or more signs up in addition to new left-turn signals into dead-end streets. Can you show a little compassion for our wildlife and instruct DOT to put up those signs? At least we can alert people. To the driver of the pickup who killed the deer, I wish upon you the most severe pain in your body day and night that you inflicted upon a poor, innocent animal. Mr. Mayor, I also request that you conduct an investigation as to why the person who killed the deer is not being pursued and charged with this senseless killing. I'm sure if this was a human, there would be a full investigation. The bottom line is, are we saying it's OK to kill an animal and speed off? Animals deserve the same respect. ROBERT A. ZINK MIDLAND BEACH [The writer is executive director of United for Wildlife Rehabilitation and Education Center, Inc.] Cliffs: Some faggot is pussy hurt a forest rat got run over.