MADISON, Wis. -

Madison police are investigating the case of a suspicious man who is accused of twice asking a 17-year-old if she wanted to have sex for money.

Police said they were contacted by the girl’s mother Monday. The woman said that in both cases her daughter was walking on Ashford Lane when the man approached her in a car. The most recent incident was Saturday afternoon. The first was six weeks before.

The car is described as an older dark-colored four-door.

Police told the mother to have her daughter call 911 immediately if the incident happens again.

Madison crime stories from the past 12 months - locations are approximate