Dr. Ed Peters considers the canonical ins and outs of the matter:
Now, any man with a 100% rating from NARAL (to highlight just the tip of the iceberg of Teddy's decades-long campaign against natural rights) has, to put it mildly, the burden of proof in seeking a Catholic funeral (okay, technically, his executors have the burden of proof, but you see the point) in that notorious pro-aborts seem to be "manifest sinners who cannot be granted ecclesiastical funerals without public scandal of the faithful."
Unless, that is, "they gave some sign of repentance before death." And there is at least some evidence that Ted Kennedy did just that.
Read the entire post at "In the Light of the Law" site.