«Liar Liar» by K.J. Larsen

Burned by her run-around ex-husband Johnnie Ricco, Caterina DeLuca took the skills she mastered during marriage and opened her own private eye agency. Now she’s a second-story woman, armed with a camera, ready to print 8x10 glossies for use in divorce court.
The men in her big, whacko family, all Chicago cops—one a crook—aren’t sure what to make of Cat’s career choice. But hey, it’s serve and protect!
Then one Rita Polansky retains Cat. Rita’s liar-liar husband is the mysterious, but seriously hot, Chance Savino. Cat is hot on his heels when an exploding building hurls her out of her stilettos and into the hospital. The FBI claims Chance was killed in the fireworks, but concussed Cat remembers a different scenario.
She escapes the hospital to meet with her client. But when Rita doesn’t show, Cat breaks into her home to find Rita with a knife in her chest and two clues at the murder scene: a clutch of candy wrappers and Chance Savino, rummaging through Rita’s drawers.
One surprise after another piles up. As no one else sights Savino, everyone around Cat thinks she’s crazy. Everyone except a determined killer who has put her on his “kill” list.