TROY, Mich. -

Troy police are asking for the public’s help in finding a missing 55-year-old man.

Police said Tuesday that a person of interest in the case is a relative of Patrick Mikes.

The family member is in custody for questioning. That person has not been charged.

"He still is a person of interest in what is apparently a violent altercation that happened inside the home," said Lt. Robert Redmond. "The investigation is still ongoing and I am quite confident there will be more to come."

The person of interest will be arraigned on financial charges Wednesday in Auburn Hills. Police sources said they are searching for Mikes outside of the Troy area.

During a press conference Monday, Redmond said Mikes left his home in the 2000 block of Homewood Drive Friday night on a bike ride but never came back.

Watch: Uncut: Troy police hold conference on missing man

He was reported missing two days later by his children, who are 21 years old and 16 years old.

Redmond said Mikes is an avid bicyclist and was last seen wearing a yellow shirt and black spandex shorts.

--A picture of the bike Mikes recently was seen riding.

Redmond also said investigators found evidence of an assault inside the home and are trying to figure out if it is related to Mikes disappearance.

"The on-scene investigator who went to the house on Sunday located evidence indicating that an assault took place at the residence," Redmond said.

Police want anyone with information on Mikes whereabouts, his biking routes or who he may be acquainted with to come forward. Tips can be left at 248-524-3477.