He found the culprit cowering behind a sofa: a deer.
The Detroit News reports the 6-point buck was bleeding when Luke found it in the study of his West Bloomfield Township home Sunday morning.
Luke said he opened the front door to let the animal leave.
"I think he was as bewildered as everyone else was," Luke said.
He said he didn't know what happened to the buck but doubts it survived its injuries.
Deer are common in the area, about 20 miles northwest of Detroit, but police say it's extremely rare for one to jump through a window.
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