MADISON, Wis. -- Madison police received a sketch of a man who illegally entered a West Washington Avenue apartment house shortly before the time that they were summoned to the scene of a woman's death two blocks away.

Holly Davis, a 21-year-old University of Wisconsin-Madison junior told WISC-TV reporter Linda Eggert that she has six roommates but all were gone just before 1 p.m. Wednesday when she said an intruder opened her front door, walked in and halfway up the stairs to her room.

Davis said that she didn't know she was home alone and said that she came out of her bedroom to find a "grungy" looking man. She said that intruder was white, appeared about 40 years old, about 5 feet 10 inches to 6 feet tall, and was wearing a gray T-shirt and blue jeans.

She said that the man said he told her had a flat tire on East Washington Avenue with his wife and thought his friend lived on her block. Then, she said the man asked her for $40, then for her to go with him and then finally left after she told him to get out of her house.

Davis said that she was angry, not scared and doesn't want to dwell on the thought that the person could be tied to the homicide investigation of Brittany Sue Zimmermann, another 21-year-old UW student who was found dead just two blocks behind her house on West Doty Street.

Davis said that Madison police took information from her after a 911 dispatcher told her to lock her doors and wait for police. She said that she phoned in an intruder report about 1 p.m.

Davis said that she gave a detective more details later and she was told the intruder might "have information" about the homicide case.

Police created a sketch of the man.

"It could be potentially be completely an unrelated incident but they think that the person who was here at least has information. That's all they would tell me," Davis said.

The student said that everyone at her house has now made locking the front door a priority.

Police are saying little about the intruder and whether it's related to the Zimmermann slaying, WISC-TV reported.

Stay tuned to WISC-TV and Channel 3000 for continuing coverage.