Wichita ? Authorities are testing the DNA of a man arrested on minor trespassing and housing code violations to see if he has any connection with the BTK serial killings that terrorized the city in the 1970s, state police said Thursday.

Since the 1980s, police have tested hundreds of samples of blood and DNA in the case, police noted.

Wichita police spokeswoman Janet Johnson told reporters Thursday that no arrest has been made in the BTK case and that investigators have received thousands of tips. If people named in the tips have outstanding warrants, they are picked up, she said. That’s what happened Wednesday night, when the man was arrested, she said.

Kansas Bureau of Investigation spokesman Kyle Smith also cautioned that the man may not have anything to do with the case.

After the arrest, police were seen taking evidence out of his Wichita home, The Wichita Eagle reported.

The DNA report could be available before Friday, Smith said.

The man was picked up on outstanding warrants related to the maintenance of his home, including failure to paint the exterior, keeping broken cars in the yard and failing to keep the property clean, police said. Details about the criminal trespassing charge were not immediately available.

The killer — known by the self-coined nickname BTK, which stands for “Bind, Torture, Kill” — is linked to eight unsolved homicides between 1974 and 1986. After years of silence, the killer surfaced in messages earlier this year.

In an appeal to the public for clues, investigators on Tuesday released a series of details that the killer mentioned in letters to Wichita media. The letters suggest the killer was born in 1939, lost his father in World War II and is a railroad buff.

The man arrested Wednesday is 64 or 65. Public records conflict gave conflicting birth years — 1939 and 1940.