Viris Illustribus: Caius Gracchus

et cum
iam a satellitibus Opimii
comprehenderetur,
iugulum
servo praebuit,
qui dominum
et mox semetipsum
super domini corpus
interemit.

http://www.slu.edu/colleges/AS/languages/classical/latin/tchmat/readers/lhomond/lho4.htm#grac

Here’s my attempt:

and when he was apprehended by Opius’s men,
he offered (his) neck to a servant
that he killed the master and soon himself above the body of the master.

???

Ut dicis
As you say…“who killed his master and soon[/then] his own self over[/on top of] the master’s body”