In March 2004, BTK emerged after some 30 years of silence with a letter to the Wichita Eagle. Since then he has engaged in a game of cat and mouse with police --- sending periodic missives that are chock full of cryptic clues.
Now Wichita Police have released a series of clues that they've culled from his 2004 letters.
He claims he was born in 1939, which would make his current age 64 or 65.
His father died in World War II, and his mother raised him.
His mother was forced to work, so his grandparents cared for him.
His mother worked during the day near the railroad.
He had a cousin named Susan, who moved to Missouri.
His family moved a lot, but always lived near a railroad.
His grandfather played the fiddle and died of a lung disease.
His mother started dating a railroad detective when BTK was around 11 years old. This relationship would have occurred during the years 1950-1955.
In the early 1950s he built and operated a ham radio.
He has participated in outdoor hobbies including hunting, fishing and camping and taking long walks.
As a youth he attended church and Sunday school.
He had a female, Hispanic acquaintance named Petra, who had a younger sister named Tina.
Around 1960, he went to a military tech school. He then joined the military for active duty and was discharged in 1966.
He has a basic knowledge of photography and the ability to develop and print pictures.
In 1966 he moved back in with his mother who had re-married and was renting out part of her house.
His first job was as an electro-mechanic, requiring some travel.
After attending more tech school, he worked repairing copiers and business equipment; this sometimes required travel and he was away from home for extended periods.
He admits to soliciting prostitutes.
He has a lifetime fascination with railroads and trains.