WIXOM, Mich. -

The Defenders are sharing insider information from home invasion experts who know what it takes to get into your home and what you can do to beef-up security.

Kenneth Fields knows how to break into your home.

"So I just pick this log up, the heaviest things there, and knock the window out," he said.

Fields should know. For years, he made a living as a professional burglar.

The law eventual caught up with him and he served his time.

Now, Fields is serving the public by revealing secrets that thieves know, like which day they mostly strike on.

"Monday and Friday," said Fields. "People don't like to get up Monday and they trying to hurry up and get out of work early on Friday."

He says crooks are always looking for their next target.

"Coming out the store with their money in their hands, you can't do that no more. Because I'm gonna get in my car and follow you," Fields said.

Fields says there were times he even approached a homeowner hoping to get a look inside the home before coming back to break in.

"I might come and ask you, 'Do you need your lawn mowed?' So right there, I'm mowing your yard and I'm scoping out your place, "he said.

Home alarms do make some thieves think twice but many think they can get in and out before police arrive.

Security cameras and dogs do keep many thieves away.

"Animals are very very helpful in crime. Because if you got a Pit-bull or a Rottweiler, I'm not coming in there," Fields said.

Retired Detroit police detective Tom Berry says exterior lighting is key.

"What we like to see with these light is we like to see a motion sensor on each one of these as well as on the rear of your house and the porch area. Somebody walks by here at night, even an animal, that lights going to go off and illuminate this area," said Berry.

It's critical that you invest in a solid door and install additional locks.

"Obviously the steel door is harder to kick in, but what I like to see is a key deadbolt," said Berry

Once inside thieves usually first go for a TV in the family room or head upstairs searching for valuables.

"The people who break into your home, they know the master bedroom is the first place they go to get their loot," Berry said.

Crooks also will likely watch a home for a few days.

This is why it’s so important if you’re out of town to have a neighbor pick up your mail and remove any packages from your porch; otherwise it's clear no one is home.

Fields remains on probation until 2024 and says he decided to share his secrets to make amends for the pain he caused others.