INKSTER, Mich. -

Inkster police are actively searching for a 25-year-old man from Dearborn Heights.

They believe he killed a 72-year-old Inkster man Thursday night in the Cherry Hill Manor Apartments.

"I am floored," said neighbor Juan Bradford. "Seems like such a heinous crime to happen here."

"This is just not right," said Tim Moore, who lives in the complex. "Who could do that to a 70-year-old man who can't protect himself?"

While neighbors can't believe what happened, police tell Local 4 the suspect targeted that apartment in the 100 Block of Cherry Valley Dr. The suspect is the ex-boyfriend of the victim's 30-year-old daughter.

"The daughter of the deceased male has been being stalked and harassed by an ex-boyfriend," said Dt. Anthony Delgreco. "He's been following her to her work, sending her thousands of text messages a day, there was even a fight in Dearborn Heights. It's been going on for 5 or 6 months."

Dt. Delgreco says the suspect came in through the complex visitor gate, driving a black BMW and forced his way into the apartment where the father and daughter lived together. That's where he brutally beat the 72-year-old, leaving the body for his ex-girlfriend to find.

"She could hardly speak when we arrived," said Dt. Delgreco. "But she was able to give us helpful information."

Police are still trying to track down the suspect. They are not releasing his name but know he left town. While police are calling this a passion of crime, the suspect should be considered dangerous.

"He's unpredictable and could be suicidal. You never know what a person in that state can do when approached," said Dt. Delgreco.

The medical examiner is trying to determine the official cause of death. The police will be turning the case over to the prosecutor as early as this weekend.