Senate Intelligence Committee member Sen. Dan Coats of Indiana told ABC's "This Week" that there are questions over whether Dzhokhar Tsarnaev will be able to talk again.
Coats said that doesn't mean the 19-year-old can't communicate, but he's "in a condition where we can't get any information from him at all."
Tsarnaev was captured from a tarp-covered boat in a suburban Boston yard Friday night and remained hospitalized in serious condition Sunday.
Tsarnaev and his 26-year-old brother, Tamerlan, were in a shootout with police early Friday. Tamerlan was killed and Dzhokhar fled the scene bleeding.