Wisconsin ? A teenager who admitted to police that he raped a woman tied to a bed, slit her throat and helped his uncle burn her remains also said he regretted what he did, a videotaped interview played for jurors on Friday shows.

Brendan Dassey, now 17, is on trial for raping and killing 25-year-old Teresa Halbach and burning her body near the family’s rural auto salvage lot on Oct. 31, 2005.

A jury convicted Dassey’s uncle, 44-year-old Steven Avery, last month of killing Halbach, rejecting his contention that he was framed by the same sheriff’s department that helped wrongly put him behind bars for a 1985 rape.

Halbach disappeared after going to the yard in rural Manitowoc County to photograph a minivan that Avery’s sister was selling through Auto Trader Magazine. Avery had called that morning to request the photo, testimony showed.

In the three-hour video – which Dassey has recanted – the teenager answers questions as he slouches on a purple love seat in a sheriff’s department interview room, never displaying any emotion.