- An elderly couple accused of gunning down their son-in-law at a crowded Dublin park allegedly carried out the killing during a supervised visit between the victim and his children, prosecutors revealed Monday.

The details emerged during a plea hearing for Shili Chen and her husband, Shouyong Zhang, both 77.

The couple pleaded not guilty to first-degree murder charges in the Sept. 26 death of Jonathan McKinsey, 40. The murder charge includes a special circumstance allegation of lying in wait.