Slang and pun

Posted by Miri Barak on May 01, 2003

As usual I turn to you in need:
it's Crime Scene Investigation:

the police finds four murdered poeple: a father, a mother, two brothers inside a house. two sisters are found alive, and one policeman says to the other:

"Teen girl heard a noise, his in the closet. Alerted the neighbors after all the shoutin' was done. Younger sister's over there. They couldn't've killed their father tag team, soaking wet."

I don't have a clue what he means by "their father tag team" and "soaking wet". I have a feeling that it is some pun. I know that wet is a slang for weak, and tag team is a slang for a gang, taken from wrestling. But these are only guesses.
Thank you for your help