JANESVILLE, Wis. -- Rock County investigators are waiting for DNA analysis from the state Crime Lab to help them determine if there was more than one suspect in the mobile home where three people were murdered.

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Danyetta Lentz, 38, and her teenage children, Nikki and Scott, were found dead in their Rock Township home, just outside Janesville, last week. Investigators said that they don't know whether there was a single assailant or multiple attackers.

Autopsies this weekend showed the three died of "complex homicidal violence." Sheriff Bob Spoden said that this means their deaths could have multiple causes.

Medical examiners still haven't released the cause of death except to confirm the three were victims of homicide.

Investigators conducted another search of a mobile home and surrounding area near the Janesville Terrace mobile-home park and Highway 51 and did find some clues. Spoden has declined to say what those clues are.

The crime scene is currently being guarded by deputies 24 hours a day, WISC-TV reported.

Janesville and Beloit are assisting the Rock County Sheriff's Department in its investigation.

The sheriff said that a tip hot line that was established has generated some good leads. Authorities are asking anyone with information on the case to call 877-262-3772. Spoden said that anyone with information, even with something that might seem inconsequential, should call the tip line. Callers can relay information anonymously, WISC-TV reported.