Is this Crabgrass? How do I kill it?

[dwclapp]

Is this Crabgrass? How do I get rid of it?

It's winter (mid-January) here in Houston, Texas and my lawn is mostly brown and dormant except for patches of a green broadleaf weed. Is this crabgrass? How do I get rid of it. It's an abandoned, foreclosed home that I purchased with a very neglected yard. I've used Scotts Lawn Pro Super Bonus S Weed And Feed each spring for 3 years, but still have this problem.

Thanks,
dwclapp