Honestly, I don't remember Mike from whatever book was his dad's. I *think* his stepmom is in forensics but it's been years and a number of installments in this series since then...and that's assuming I guessed the right person.
So Gina is in line for a promotion to S.W.A.T...as is her partner. She wants to be the best of the best (overachiever). Her partner OTOH, is content to be accepted. She gets shot near the beginning of the book, and Mike (H) is her therapist. Actually, he's last resort as she'd refused to listen to the last two. He gets to spend the next several weeks keeping her out of trouble as she tries to figure out who shot her...and several other contenders.
As it turns out, her partner's dad was attempting to stack the deck in his son's favor by eliminating the competition - one minority at a time. The son figured it out at some point, but did nothing to dissuade dear old dad. Further, he more or less left her twisting in the wind after a run-in with the ex of a woman he'd been sniffing around (ex was abusive)
High-lights - no story arc to drag through half a dozen books (thank you Jesus)
Book was essentially a stand-alone. You'd have to go digging through the series to even find some of the characters (I sort of remember several mentioned on the S.W.A.T team but that was several years and a couple of story arcs ago)
Low-light - it being so long before revisiting the group there meant you almost felt lost at times. Fortunately I guess, you don't hang around any of the previously used characters too long - well, other than dear old dad. Still...
Heroine's attitude got old after a while. There's prickly and there's being a bitch. She strayed entirely too closely to the latter at times.