MALDEN, Mass. -- A Malden father and Massachusetts Institute of Technology administrator remains behind bars Tuesday, charged with killing his 6-month-old son over the weekend, even as his lawyer says he is a loving father.

Geoffrey Wilson, 31, was arrested and charged Sunday in connection with the death of his son Nathan, who state prosecutors died after suffering injuries consistent with shaken baby syndrome.

But both sides of the case are telling very different stories. Prosecutors said the baby's mother, Dilkushi Wilson, returned home from church to find the baby unresponsive and tried to call 911 at least three times, but Wilson insisted on driving the baby 10 miles into Boston to Children's Hospital.

"There were bruises on Nathan's forehead. A bruise on his chin. A bruise on his cheek. The injury, according to his doctor, was consistent with extremely violent shaking," state prosecutor Marcy Jackson said in Malden District Court.

Prosecutors said the baby was shaken so hard there was no chance he would survive.

Geoffrey Wilson showed little emotion in court, but his attorney said he was a loving father.

"By all accounts of every person I've spoken to, Geoff adored his son and loved nothing better than to spend time playing with him and being with him," Wilson's attorney, Jay Carney, said.

Prosecutors, however, allege Wilson, an MIT grad who now works at the school as a senior contracts and intellectual property administrator in the MIT Media Lab, snapped when his wife went to church and the baby got fussy. His lawyer is promising a vigorous defense.

"We intend to investigate this case thoroughly. I am confident that it will not be that Geoff Wilson murdered his son," Carney said.

Wilson is scheduled to return to court on March 29.